1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803
|
Network Working Group F. Baker
Request for Comments: 1406 Advanced Computer Communications
Obsoletes: 1232 J. Watt
Newbridge Networks Corporation
Editors
January 1993
Definitions of Managed Objects for the DS1 and E1 Interface Types
Status of this Memo
This RFC specifies an IAB standards track protocol for the Internet
community, and requests discussion and suggestions for improvements.
Please refer to the current edition of the "IAB Official Protocol
Standards" for the standardization state and status of this protocol.
Distribution of this memo is unlimited.
Abstract
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in TCP/IP-based internets.
In particular, it defines objects for managing DS1 Interfaces --
including both T1 and E1 (a.k.a., CEPT 2 Mbit/s) links.
This document entirely replaces RFC 1232, which contains a
fundamental error: many objects are encoded as Counters that must be
encoded as INTEGERs or Gauges. The magnitude of the change required
is sufficient that virtually every object changed. Therefore, the
MIB documented in RFC 1232 should not be implemented.
Table of Contents
1. The Network Management Framework ...................... 2
2. Objects ............................................... 2
2.1 Format of Definitions ................................ 3
2.2 Changes from RFC 1232 ................................ 3
3. Overview .............................................. 4
3.1 Binding between ifIndex and DS1 Interfaces ........... 5
3.2 Objectives of this MIB Module ........................ 7
3.3 DS1 Terminology ...................................... 7
3.3.1 Error Events ....................................... 7
3.3.2 Performance Defects ................................ 8
3.3.3 Performance Parameters ............................. 9
3.3.4 Failure States ..................................... 11
3.3.5 Other Terms ........................................ 13
4. Definitions ........................................... 14
4.1 DS1 Near End Group ................................... 14
Trunk MIB Working Group [Page 1]
RFC 1406 DS1/E1 MIB January 1993
4.1.1 DS1 Configuration Table ............................ 14
4.1.2 DS1 Current Table .................................. 22
4.1.3 DS1 Interval Table ................................. 26
4.1.4 DS1 Total Table .................................... 30
4.2 DS1 Far End Group .................................... 33
4.2.1 DS1 Far End Current Table .......................... 34
4.2.2 DS1 Far End Interval Table ......................... 38
4.2.3 DS1 Far End Total Table ............................ 41
4.3 DS1 Fractional Group ................................. 45
4.3.1 DS1 Fractional Table ............................... 45
5. Acknowledgements ...................................... 47
6. References ............................................ 48
7. Security Considerations ............................... 50
8. Authors' Addresses .................................... 50
1. The Network Management Framework
The Internet-standard Network Management Framework consists of three
components. They are:
STD 16/RFC 1155 [1] which defines the SMI, the mechanisms used for
describing and naming objects for the purpose of management. STD
16/RFC 1212 [2] defines a more concise description mechanism,
which is wholly consistent with the SMI.
RFC 1156 [3] which defines MIB-I, the core set of managed objects
for the Internet suite of protocols. STD 17/RFC 1213 [4] defines
MIB-II, an evolution of MIB-I based on implementation experience
and new operational requirements.
STD 15/RFC 1157 [5] which defines the SNMP, the protocol used for
network access to managed objects.
The Framework permits new objects to be defined for the purpose of
experimentation and evaluation.
2. Objects
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the subset of Abstract Syntax Notation One (ASN.1) [6]
defined in the SMI. In particular, each object has a name, a syntax,
and an encoding. The name is an object identifier, an
administratively assigned name, which specifies an object type. The
object type together with an object instance serves to uniquely
identify a specific instantiation of the object. For human
convenience, we often use a textual string, termed the OBJECT
DESCRIPTOR, to also refer to the object type.
Trunk MIB Working Group [Page 2]
RFC 1406 DS1/E1 MIB January 1993
The syntax of an object type defines the abstract data structure
corresponding to that object type. The ASN.1 language is used for
this purpose. However, the SMI [1] purposely restricts the ASN.1
constructs which may be used. These restrictions are explicitly made
for simplicity.
The encoding of an object type is simply how that object type is
represented using the object type's syntax. Implicitly tied to the
notion of an object type's syntax and encoding is how the object type
is represented when being transmitted on the network.
The SMI specifies the use of the basic encoding rules of ASN.1 [7],
subject to the additional requirements imposed by the SNMP.
2.1. Format of Definitions
Section 4 contains contains the specification of all object types
contained in this MIB module. The object types are defined using the
conventions defined in the SMI, as amended by the extensions
specified in STD 16, RFC 1212 [2].
2.2. Changes from RFC 1232
The changes from RFC 1232 are the following:
(1) This MIB module contains three groups: DS1 Near End Group
which is mandatory, DS1 Far End Group which is optional,
and the Fractional Table, which is optional.
(2) The Far End Group is a new group and contains statistics
that are collected from the far end DS1 interface. The
Far End Group may only be implemented by DS1 systems that
use the facilities data link to exchange this information
- both T1.403 and PUB 54016 define ways to exchange this
information over data links; vendors may use other
proprietary means to do this on various link types.
(3) ds1CSUIndex has been renamed dsx1LineIndex. This object
is the identifier of a DS1 Interface on a device. On a
CSU, a single DS1 data stream will cross two DS1
interfaces, which have separate dsx1LineIndex values.
(4) ds1Index has been renamed dsx1IfIndex. This value for
this object is equal to the value of ifIndex from the
Interfaces table of MIB II (STD 17, RFC 1213).
(5) an object has been added (dsx1TransmitClockSource) to
indicate the source of transmit clock.
Trunk MIB Working Group [Page 3]
RFC 1406 DS1/E1 MIB January 1993
(6) The ACCESS for objects in the dsx1ConfigTable has been
set to read-write for items that are configurable.
(7) Description of test configurations has changed. A new
object has been added called dsx1LoopbackConfig, which
better describes the loopback capabilities of a DS1
interface on a device.
(8) The description of line alarm status has changed. A new
object has been added called dsx1LineStatus. This object
better describes the status (e.g., failure state and
loopback state) of a DS1 interface.
(9) All Counters have been changed to Gauges.
(10) Information about how applications might use the zero
code suppression have been removed; only the actual line
coding algorithm is described. For clarity the object
was thus renamed to dsx1LineCoding.
(11) A Line Errored Seconds object has been added to all near
end tables and the count of Bipolar Violations (BPVs) was
changed to a count of Line Code Violations (LCVs).
(12) Bursty Errored Seconds (a.k.a., Errored Seconds Type B)
and Degraded Minutes objects have been added to all near
end tables.
(13) The Coding Violation error event is now referred to as a
Path Coding Violation (PCV) Error Event.
3. Overview
These objects are used when the particular media being used to
realize an interface is a DS1 physical interface. At present, this
applies to these values of the ifType variable in the Internet-
standard MIB:
ds1 (18)
e1 (19)
The definitions contained herein are based on the AT&T T-1 Superframe
(a.k.a., D4) and Extended Superframe (ESF) formats [8, 9], the latter
of which conforms to ANSI specifications [10], and the CCITT
Recommendations [11, 12], referred to as E1 for the rest of this
memo.
Trunk MIB Working Group [Page 4]
RFC 1406 DS1/E1 MIB January 1993
The various T1 and E1 line disciplines are similar enough that
separate MIBs are unwarranted, although there are some differences.
For example, Loss of Frame is defined more rigorously in the ESF
specification than in the D4 specification, but it is defined in
both.
Where it is necessary to distinguish between the flavors of E1 with
and without CRC, E1-CRC to denotes the "with CRC" form (G.704 Table
4b) and E1-noCRC denotes the "without CRC" form (G.704 Table 4a).
3.1. Binding between ifIndex and DS1 Interfaces
Different physical configurations for the support of SNMP with DS1
equipment exist. To accommodate these scenarios, two different
indices for DS1 interfaces are introduced in this MIB. These indices
are dsx1IfIndex and dsx1LineIndex.
External interface scenario: the SNMP Agent represents all managed
DS1 lines as external interfaces (for example, an Agent residing on
the device supporting DS1 interfaces directly):
For this scenario, all interfaces are assigned an integer value equal
to ifIndex, and the following applies:
ifIndex=dsx1IfIndex=dsx1LineIndex for all interfaces.
The dsx1IfIndex column of the DS1 Configuration table relates each
DS1 interface to its corresponding interface (ifIndex) in the
Internet-standard MIB (MIB-II STD 17, RFC 1213).
External & Internal interface scenario: the SNMP Agents resides on an
host external from the device supporting DS1 interfaces (e.g., a
router). The Agent represents both the host and the DS1 device. The
index dsx1LineIndex is used to not only represent the DS1 interfaces
external from the host/DS1-device combination, but also the DS1
interfaces connecting the host and the DS1 device. The index
dsx1IfIndex is always equal to ifIndex.
Example:
A shelf full of CSUs connected to a Router. An SNMP Agent residing
on the router proxies for itself and the CSU. The router has also an
Ethernet interface:
Trunk MIB Working Group [Page 5]
RFC 1406 DS1/E1 MIB January 1993
+-----+
| | |
| | | +---------------------+
|E | | 1.544 MBPS | Line#A | DS1 Link
|t | R |---------------+ - - - - - - - - - +------>
|h | | | |
|e | O | 1.544 MBPS | Line#B | DS1 Link
|r | |---------------+ - - - - - - - - - - +------>
|n | U | | CSU Shelf |
|e | | 1.544 MBPS | Line#C | DS1 Link
|t | T |---------------+ - - - -- -- - - - - +------>
| | | | |
|-----| E | 1.544 MBPS | Line#D | DS1 Link
| | |---------------+ - - - - -- - - - - +------>
| | R | |_____________________|
| | |
| +-----+
The assignment of the index values could for example be:
ifIndex (= dsx1IfIndex) dsx1LineIndex
1 NA NA (Ethernet)
2 Line#A Router Side 6
2 Line#A Network Side 7
3 Line#B Router Side 8
3 Line#B Network Side 9
4 Line#C Router Side 10
4 Line#C Network Side 11
5 Line#D Router Side 12
5 Line#D Network Side 13
For this example, ifNumber is equal to 5. Note the following
description of dsx1LineIndex: the dsx1LineIndex identifies a DS1
Interface on a managed device. If there is an ifEntry that is
directly associated with this and only this DS1 interface, it should
have the same value as ifIndex. Otherwise, number the
dsx1LineIndices with an unique identifier following the rules of
choosing a number greater than ifNumber and numbering inside
interfaces (e.g., equipment side) with even numbers and outside
interfaces (e.g., network side) with odd numbers.
If the CSU shelf is managed by itself by a local SNMP Agent, the
situation would be:
Trunk MIB Working Group [Page 6]
RFC 1406 DS1/E1 MIB January 1993
ifIndex (= dsx1IfIndex) dsx1LineIndex
2 Line#A Router Side 2
1 Line#A Network Side 1
4 Line#B Router Side 4
3 Line#B Network Side 3
6 Line#C Router Side 6
5 Line#C Network Side 5
8 Line#D Router Side 8
7 Line#D Network Side 7
3.2. Objectives of this MIB Module
There are numerous things that could be included in a MIB for DS1
signals: the management of multiplexors, CSUs, DSUs, and the like.
The intent of this document is to facilitate the common management of
all devices with DS1 interfaces. As such, a design decision was made
up front to very closely align the MIB with the set of objects that
can generally be read from DS1 devices that are currently deployed.
3.3. DS1 Terminology
The terminology used in this document to describe error conditions on
a DS1 interface as monitored by a DS1 device are based on the
definitions from the ANSI T1M1.3/92-005R1 draft standard [13]. If
the definition in this document does not match the definition in the
ANSI T1M1.3/92-005R1 draft document, the implementer should follow
the definition described in this document.
3.3.1. Error Events
Bipolar Violation (BPV) Error Event
A BPV error event for an AMI-coded signal is the
occurrence of a pulse of the same polarity as the
previous pulse. A BPV error event for a B8ZS- or HDB3-
coded signal is the occurrence of a pulse of the same
polarity as the previous pulse without being a part of
the zero substitution code.
Excessive Zeroes (EXZ) Error Event
An Excessive Zeroes error event for an AMI-coded signal
is the occurrence of more than fifteen contiguous zeroes.
For a B8ZS coded signal, the defect occurs when more than
seven contiguous zeroes are detected.
Line Coding Violation (LCV) Error Event
A Line Coding Violation (LCV) is the occurrence of either
a Bipolar Violation (BPV) or Excessive Zeroes (EXZ) Error
Event.
Trunk MIB Working Group [Page 7]
RFC 1406 DS1/E1 MIB January 1993
Path Coding Violation (PCV) Error Event
A Path Coding Violation error event is a frame
synchronization bit error in the D4 and E1-noCRC formats,
or a CRC error in the ESF and E1-CRC formats.
Controlled Slip (CS) Error Event
A Controlled Slip is the replication or deletion of the
payload bits of a DS1 frame. A Controlled Slip may be
performed when there is a difference between the timing
of a synchronous receiving terminal and the received
signal. A Controlled Slip does not cause an Out of Frame
defect.
3.3.2. Performance Defects
Out Of Frame (OOF) Defect
An OOF defect is the occurrence of a particular density
of Framing Error events.
For T1 links, an Out of Frame defect is declared when the
receiver detects two or more framing errors within a 3
msec period for ESF signals and 0.75 msec for D4 signals,
or two or more errors out of five or fewer consecutive
framing-bits.
For E1 links, an Out Of Frame defect is declared when
three consecutive frame alignment signals have been
received with an error (see G.706 Section 4.1 [17]).
Once an Out Of Frame Defect is declared, the framer
starts searching for a correct framing pattern. The Out
of Frame defect ends when the signal is in frame.
In-frame occurs when there are fewer than two frame bit
errors within 3 msec period for ESF signals and 0.75 msec
for D4 signals.
For E1 links, in-frame occurs when a) in frame N the
frame alignment signal is correct and b) in frame N+1 the
frame alignment signal is absent (i.e., bit 2 in TS0 is a
one) and c) in frame N+2 the frame alignment signal is
present and correct.
Alarm Indication Signal (AIS) Defect
For D4 and ESF links, the 'all ones' condition is
detected at a DS1 line interface upon observing an
unframed signal with a one's density of at least 99.9%
present for a time equal to or greater than T, where 3 ms
Trunk MIB Working Group [Page 8]
RFC 1406 DS1/E1 MIB January 1993
<= T <= 75 ms. The AIS is terminated upon observing a
signal not meeting the one's density or the unframed
signal criteria for a period equal to or greater than
than T.
For E1 links, the 'all-ones' condition is detected at the
line interface as a string of 512 bits containing fewer
than three zero bits (see O.162 [14] Section 3.3.2).
3.3.3. Performance Parameters
All performance parameters are accumulated in fifteen minute
intervals and up to 96 intervals (24 hours worth) are kept by an
agent. Fewer than 96 intervals of data will be available if the
agent has been restarted within the last 24 hours. In addition,
there is a rolling 24-hour total of each performance parameter.
There is no requirement for an agent to ensure fixed relationship
between the start of a fifteen minute interval and any wall clock;
however some agents may align the fifteen minute intervals with
quarter hours.
Line Errored Seconds (LES)
A Line Errored Second, according to T1M1.3, is a second
in which one or more Line Code Violation error events
were detected.
While many implementations are currently unable to detect
the zero strings, it is expected that interface
manufacturers will add this capability in deference to
ANSI; therefore, it will become available in time.
In the T1M1.3 specification, near end Line Code
Violations and far end Line Errored Seconds are counted.
For consistency, we count Line Errored Seconds at both
ends.
Controlled Slip Seconds (CSS)
A Controlled Slip Second is a one-second interval
containing one or more controlled slips.
Errored Seconds (ES)
For ESF and E1-CRC links an Errored Second is a second
with one or more Path Code Violations OR one or more Out
of Frame defects OR one or more Controlled Slip events OR
a detected AIS defect.
For D4 and E1-noCRC links, the presence of Bipolar
Trunk MIB Working Group [Page 9]
RFC 1406 DS1/E1 MIB January 1993
Violations also triggers an Errored Second.
This is not incremented during an Unavailable Second.
Bursty Errored Seconds (BES)
A Bursty Errored Second (also known as Errored Second
type B) is a second with fewer than 320 and more than 1
Path Coding Violation error events, no Severely Errored
Frame defects and no detected incoming AIS defects.
Controlled slips are not included in this parameter.
This is not incremented during an Unavailable Second.
Severely Errored Seconds (SES)
A Severely Errored Second for ESF signals is a second
with 320 or more Path Code Violation Error Events OR one
or more Out of Frame defects OR a detected AIS defect.
For E1-CRC signals, a Severely Errored Second is a second
with 832 or more Path Code Violation error events OR one
or more Out of Frame defects.
For E1-noCRC signals, a Severely Errored Second is a 2048
LCVs or more.
For D4 signals, a Severely Errored Second is a count of
one-second intervals with Framing Error events, or an OOF
defect, or 1544 LCVs or more.
Controlled slips are not included in this parameter.
This is not incremented during an Unavailable Second.
Severely Errored Framing Second (SEFS)
An Severely Errored Framing Second is a second with one
or more Out of Frame defects OR a detected AIS defect.
Degraded Minutes
A Degraded Minute is one in which the estimated error
rate exceeds 1E-6 but does not exceed 1E-3 (see G.821
[15]).
Degraded Minutes are determined by collecting all of the
Available Seconds, removing any Severely Errored Seconds
grouping the result in 60-second long groups and counting
a 60-second long group (a.k.a., minute) as degraded if the
cumulative errors during the seconds present in the group
exceed 1E-6. Available seconds are merely those seconds
Trunk MIB Working Group [Page 10]
RFC 1406 DS1/E1 MIB January 1993
which are not Unavailable as described below.
Unavailable Seconds (UAS)
Unavailable Seconds (UAS) are calculated by counting the
number of seconds that the interface is unavailable. The
DS1 interface is said to be unavailable from the onset of
10 contiguous SESs, or the onset of the condition leading
to a failure (see Failure States). If the condition
leading to the failure was immediately preceded by one or
more contiguous SESs, then the DS1 interface
unavailability starts from the onset of these SESs. Once
unavailable, and if no failure is present, the DS1
interface becomes available at the onset of 10 contiguous
seconds with no SESs. Once unavailable, and if a failure
is present, the DS1 interface becomes available at the
onset of 10 contiguous seconds with no SESs, if the
failure clearing time is less than or equal to 10
seconds. If the failure clearing time is more than 10
seconds, the DS1 interface becomes available at the onset
of 10 contiguous seconds with no SESs, or the onset
period leading to the successful clearing condition,
whichever occurs later. With respect to the DS1 error
counts, all counters are incremented while the DS1
interface is deemed available. While the interface is
deemed unavailable, the only count that is incremented is
UASs.
A special case exists when the 10 or more second period
crosses the 900 second statistics window boundary, as the
foregoing description implies that the Severely Errored
Second and Unavailable Second counters must be adjusted
when the Unavailable Signal State is entered. Clearly,
successive GETs of the affected dsx1IntervalSESs and
dsx1IntervalUASs objects will return differing values if
the first GET occurs during the first few seconds of the
window. This is viewed as an unavoidable side-effect of
selecting the presently defined managed objects as a
basis for this memo.
3.3.4. Failure States
The following failure states are received, or detected failures, that
are reported in the dsx1LineStatus object. When a DS1 interface
would, if ever, produce the conditions leading to the failure state
is described in the appropriate specification.
Trunk MIB Working Group [Page 11]
RFC 1406 DS1/E1 MIB January 1993
Far End Alarm Failure
The Far End Alarm failure is also known as "Yellow Alarm"
in the T1 case and "Distant Alarm" in the E1 case.
For D4 links, the Far End Alarm failure is declared when
bit 6 of all channels has been zero for at least 335 ms
and is cleared when bit 6 of at least one channel is
non-zero for a period T, where T is usually less than one
second and always less than 5 seconds. The Far End Alarm
failure is not declared for D4 links when a Loss of
Signal is detected.
For ESF links, the Far End Alarm failure is declared if
the Yellow Alarm signal pattern occurs in at least seven
out of ten contiguous 16-bit pattern intervals and is
cleared if the Yellow Alarm signal pattern does not occur
in ten contiguous 16-bit signal pattern intervals.
For E1 links, the Far End Alarm failure is declared when
bit 3 of time-slot zero is received set to one on two
consecutive occasions. The Far End Alarm failure is
cleared when bit 3 of time-slot zero is received set to
zero.
Alarm Indication Signal (AIS) Failure
The Alarm Indication Signal failure is declared when an
AIS defect is detected at the input and the AIS defect
still exists after the Loss Of Frame failure (which is
caused by the unframed nature of the 'all-ones' signal)
is declared. The AIS failure is cleared when the Loss Of
Frame failure is cleared.
Loss Of Frame Failure
For T1 links, the Loss Of Frame failure is declared when
an OOF or LOS defect has persisted for T seconds, where
2 <= T <= 10. The Loss Of Frame failure is cleared when
there have been no OOF or LOS defects during a period T
where 0 <= T <= 20. Many systems will perform "hit
integration" within the period T before declaring or
clearing the failure e.g., see TR 62411 [16].
For E1 links, the Loss Of Frame Failure is declared when
an OOF defect is detected.
Loss Of Signal Failure
For T1, the Loss Of Signal failure is declared upon
observing 175 +/- 75 contiguous pulse positions with no
pulses of either positive or negative polarity. The LOS
Trunk MIB Working Group [Page 12]
RFC 1406 DS1/E1 MIB January 1993
failure is cleared upon observing an average pulse
density of at least 12.5% over a period of 175 +/- 75
contiguous pulse positions starting with the receipt of a
pulse.
For E1 links, the Loss Of Signal failure is declared when
greater than 10 consecutive zeroes are detected (see
O.162 Section 3.4.4).
Loopback Pseudo-Failure
The Loopback Pseudo-Failure is declared when the near end
equipment has placed a loopback (of any kind) on the DS1.
This allows a management entity to determine from one
object whether the DS1 can be considered to be in service
or not (from the point of view of the near end
equipment).
TS16 Alarm Indication Signal Failure
For E1 links, the TS16 Alarm Indication Signal failure is
declared when time-slot 16 is received as all ones for
all frames of two consecutive multiframes (see G.732
Section 4.2.6). This condition is never declared for T1.
Loss Of MultiFrame Failure
The Loss Of MultiFrame failure is declared when two
consecutive multiframe alignment signals (bits 4 through
7 of TS16 of frame 0) have been received with an error.
The Loss Of Multiframe failure is cleared when the first
correct multiframe alignment signal is received. The
Loss Of Multiframe failure can only be declared for E1
links operating with G.732 [18] framing (sometimes called
"Channel Associated Signalling" mode).
Far End Loss Of Multiframe Failure
The Far End Loss Of Multiframe failure is declared when
bit 2 of TS16 of frame 0 is received set to one on two
consecutive occasions. The Far End Loss Of Multiframe
failure is cleared when bit 2 of TS16 of frame 0 is
received set to zero. The Far End Loss Of Multiframe
failure can only be declared for E1 links operating in
"Channel Associated Signalling" mode.
3.3.5. Other Terms
Circuit Identifier
This is a character string specified by the circuit
vendor, and is useful when communicating with the vendor
during the troubleshooting process.
Trunk MIB Working Group [Page 13]
RFC 1406 DS1/E1 MIB January 1993
4. Definitions
RFC1406-MIB DEFINITIONS ::= BEGIN
IMPORTS
Gauge
FROM RFC1155-SMI
transmission, DisplayString
FROM RFC1213-MIB
OBJECT-TYPE
FROM RFC-1212;
-- This MIB module uses the extended OBJECT-TYPE macro as
-- defined in RFC 1212.
-- this is the MIB module for the DS1 objects
ds1 OBJECT IDENTIFIER ::= { transmission 18 }
-- note that this subsumes cept (19); there is no separate CEPT MIB
-- The DS1 Near End Group
-- Implementation of this group is mandatory for all systems
-- that attach to a DS1 Interface.
-- The DS1 Near End Group consists of four tables:
-- DS1 Configuration
-- DS1 Current
-- DS1 Interval
-- DS1 Total
-- the DS1 Configuration Table
dsx1ConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1ConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS1 Configuration table."
::= { ds1 6 }
dsx1ConfigEntry OBJECT-TYPE
SYNTAX Dsx1ConfigEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
Trunk MIB Working Group [Page 14]
RFC 1406 DS1/E1 MIB January 1993
"An entry in the DS1 Configuration table."
INDEX { dsx1LineIndex }
::= { dsx1ConfigTable 1 }
Dsx1ConfigEntry ::=
SEQUENCE {
dsx1LineIndex
INTEGER,
dsx1IfIndex
INTEGER,
dsx1TimeElapsed
INTEGER,
dsx1ValidIntervals
INTEGER,
dsx1LineType
INTEGER,
dsx1LineCoding
INTEGER,
dsx1SendCode
INTEGER,
dsx1CircuitIdentifier
DisplayString,
dsx1LoopbackConfig
INTEGER,
dsx1LineStatus
INTEGER,
dsx1SignalMode
INTEGER,
dsx1TransmitClockSource
INTEGER,
dsx1Fdl
INTEGER
}
dsx1LineIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This object is the identifier of a DS1 Inter-
face on a managed device. If there is an ifEn-
try that is directly associated with this and
only this DS1 interface, it should have the
same value as ifIndex. Otherwise, the value
exceeds ifNumber, and is a unique identifier
following this rule: inside interfaces (e.g.,
equipment side) with even numbers and outside
interfaces (e.g., network side) with odd
Trunk MIB Working Group [Page 15]
RFC 1406 DS1/E1 MIB January 1993
numbers."
::= { dsx1ConfigEntry 1 }
dsx1IfIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This value for this object is equal to the
value of ifIndex from the Interfaces table of
MIB II (RFC 1213)."
::= { dsx1ConfigEntry 2 }
dsx1TimeElapsed OBJECT-TYPE
SYNTAX INTEGER (0..899)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of seconds that have elapsed since
the beginning of the current error-measurement
period."
::= { dsx1ConfigEntry 3 }
dsx1ValidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of previous intervals for which
valid data was collected. The value will be 96
unless the interface was brought on-line within
the last 24 hours, in which case the value will
be the number of complete 15 minute intervals
the since interface has been online."
::= { dsx1ConfigEntry 4 }
dsx1LineType OBJECT-TYPE
SYNTAX INTEGER {
other(1),
dsx1ESF(2),
dsx1D4(3),
dsx1E1(4),
dsx1E1-CRC(5),
dsx1E1-MF(6),
Trunk MIB Working Group [Page 16]
RFC 1406 DS1/E1 MIB January 1993
dsx1E1-CRC-MF(7)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable indicates the variety of DS1
Line implementing this circuit. The type of
circuit affects the number of bits per second
that the circuit can reasonably carry, as well
as the interpretation of the usage and error
statistics. The values, in sequence, describe:
TITLE: SPECIFICATION:
dsx1ESF Extended SuperFrame DS1
dsx1D4 AT&T D4 format DS1
dsx1E1 CCITT Recommendation G.704
(Table 4a)
dsx1E1-CRC CCITT Recommendation G.704
(Table 4b)
dsxE1-MF G.704 (Table 4a) with TS16
multiframing enabled
dsx1E1-CRC-MF G.704 (Table 4b) with TS16
multiframing enabled"
::= { dsx1ConfigEntry 5 }
dsx1LineCoding OBJECT-TYPE
SYNTAX INTEGER {
dsx1JBZS (1),
dsx1B8ZS (2),
dsx1HDB3 (3),
dsx1ZBTSI (4),
dsx1AMI (5),
other(6)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable describes the variety of Zero
Code Suppression used on the link, which in
turn affects a number of its characteristics.
dsx1JBZS refers the Jammed Bit Zero Suppres-
sion, in which the AT&T specification of at
least one pulse every 8 bit periods is literal-
ly implemented by forcing a pulse in bit 8 of
each channel. Thus, only seven bits per chan-
Trunk MIB Working Group [Page 17]
RFC 1406 DS1/E1 MIB January 1993
nel, or 1.344 Mbps, is available for data.
dsx1B8ZS refers to the use of a specified pat-
tern of normal bits and bipolar violations
which are used to replace a sequence of eight
zero bits.
ANSI Clear Channels may use dsx1ZBTSI, or Zero
Byte Time Slot Interchange.
E1 links, with or without CRC, use dsx1HDB3 or
dsx1AMI.
dsx1AMI refers to a mode wherein no zero code
suppression is present and the line encoding
does not solve the problem directly. In this
application, the higher layer must provide data
which meets or exceeds the pulse density re-
quirements, such as inverting HDLC data."
::= { dsx1ConfigEntry 6 }
dsx1SendCode OBJECT-TYPE
SYNTAX INTEGER {
dsx1SendNoCode(1),
dsx1SendLineCode(2),
dsx1SendPayloadCode(3),
dsx1SendResetCode(4),
dsx1SendQRS(5),
dsx1Send511Pattern(6),
dsx1Send3in24Pattern(7),
dsx1SendOtherTestPattern(8)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable indicates what type of code is
being sent across the DS1 interface by the dev-
ice. The values mean:
dsx1SendNoCode
sending looped or normal data
dsx1SendLineCode
sending a request for a line loopback
dsx1SendPayloadCode
sending a request for a payload loopback
Trunk MIB Working Group [Page 18]
RFC 1406 DS1/E1 MIB January 1993
dsx1SendResetCode
sending a loopback termination request
dsx1SendQRS
sending a Quasi-Random Signal (QRS) test
pattern
dsx1Send511Pattern
sending a 511 bit fixed test pattern
dsx1Send3in24Pattern
sending a fixed test pattern of 3 bits set
in 24
dsx1SendOtherTestPattern
sending a test pattern other than those
described by this object"
::= { dsx1ConfigEntry 7 }
dsx1CircuitIdentifier OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable contains the transmission
vendor's circuit identifier, for the purpose of
facilitating troubleshooting."
::= { dsx1ConfigEntry 8 }
dsx1LoopbackConfig OBJECT-TYPE
SYNTAX INTEGER {
dsx1NoLoop(1),
dsx1PayloadLoop(2),
dsx1LineLoop(3),
dsx1OtherLoop(4)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This variable represents the loopback confi-
guration of the DS1 interface. Agents support-
ing read/write access should return badValue in
response to a requested loopback state that the
interface does not support. The values mean:
Trunk MIB Working Group [Page 19]
RFC 1406 DS1/E1 MIB January 1993
dsx1NoLoop
Not in the loopback state. A device that
is not capable of performing a loopback on
the interface shall always return this as
it's value.
dsx1PayloadLoop
The received signal at this interface is
looped through the device. Typically the
received signal is looped back for re-
transmission after it has passed through
the device's framing function.
dsx1LineLoop
The received signal at this interface does
not go through the device (minimum pene-
tration) but is looped back out.
dsx1OtherLoop
Loopbacks that are not defined here."
::= { dsx1ConfigEntry 9 }
dsx1LineStatus OBJECT-TYPE
SYNTAX INTEGER (1..8191)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This variable indicates the Line Status of the
interface. It contains loopback, failure, re-
ceived 'alarm' and transmitted 'alarm' infor-
mation.
The dsx1LineStatus is a bit map represented as a sum,
therefore, it can represent multiple failures (alarms) and
a LoopbackState simultaneously.
dsx1NoAlarm should be set if and only if no other flag is
set.
If the dsx1LoopbackState bit is set, the loopback in ef-
fect can be determined from the dsx1LoopbackConfig object.
The various bit positions are:
1 dsx1NoAlarm No Alarm Present
2 dsx1RcvFarEndLOF Far end LOF (a.k.a., Yellow Alarm)
4 dsx1XmtFarEndLOF Near end sending LOF Indication
8 dsx1RcvAIS Far end sending AIS
Trunk MIB Working Group [Page 20]
RFC 1406 DS1/E1 MIB January 1993
16 dsx1XmtAIS Near end sending AIS
32 dsx1LossOfFrame Near end LOF (a.k.a., Red Alarm)
64 dsx1LossOfSignal Near end Loss Of Signal
128 dsx1LoopbackState Near end is looped
256 dsx1T16AIS E1 TS16 AIS
512 dsx1RcvFarEndLOMF Far End Sending TS16 LOMF
1024 dsx1XmtFarEndLOMF Near End Sending TS16 LOMF
2048 dsx1RcvTestCode Near End detects a test code
4096 dsx1OtherFailure any line status not defined here"
::= { dsx1ConfigEntry 10 }
dsx1SignalMode OBJECT-TYPE
SYNTAX INTEGER {
none (1),
robbedBit (2),
bitOriented (3),
messageOriented (4)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"'none' indicates that no bits are reserved for
signaling on this channel.
'robbedBit' indicates that T1 Robbed Bit Sig-
naling is in use.
'bitOriented' indicates that E1 Channel Asso-
ciated Signaling is in use.
'messageOriented' indicates that Common Chan-
nel Signaling is in use either on channel 16 of
an E1 link or channel 24 of a T1."
::= { dsx1ConfigEntry 11 }
dsx1TransmitClockSource OBJECT-TYPE
SYNTAX INTEGER {
loopTiming (1),
localTiming (2),
throughTiming (3)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The source of Tranmit Clock.
Trunk MIB Working Group [Page 21]
RFC 1406 DS1/E1 MIB January 1993
'loopTiming' indicates that the recovered re-
ceive clock is used as the transmit clock.
'localTiming' indicates that a local clock
source is used.
'throughTiming' indicates that recovered re-
ceive clock from another interface is used as
the transmit clock."
::= { dsx1ConfigEntry 12 }
dsx1Fdl OBJECT-TYPE
SYNTAX INTEGER {
other(1),
dsx1Ansi-T1-403(2),
dsx1Att-54016(4),
dsx1Fdl-none(8)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This bitmap describes the use of the facili-
ties data link, and is the sum of the capabili-
ties:
'other' indicates that a protocol other than
one following is used.
'dsx1Ansi-T1-403' refers to the FDL exchange
recommended by ANSI.
'dsx1Att-54016' refers to ESF FDL exchanges.
'dsx1Fdl-none' indicates that the device does
not use the FDL."
::= { dsx1ConfigEntry 13 }
-- the DS1 Current Table
-- The DS1 current table contains various statistics being
-- collected for the current 15 minute interval.
dsx1CurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1CurrentEntry
ACCESS not-accessible
STATUS mandatory
Trunk MIB Working Group [Page 22]
RFC 1406 DS1/E1 MIB January 1993
DESCRIPTION
"The DS1 Current table."
::= { ds1 7 }
dsx1CurrentEntry OBJECT-TYPE
SYNTAX Dsx1CurrentEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS1 Current table."
INDEX { dsx1CurrentIndex }
::= { dsx1CurrentTable 1 }
Dsx1CurrentEntry ::=
SEQUENCE {
dsx1CurrentIndex
INTEGER,
dsx1CurrentESs
Gauge,
dsx1CurrentSESs
Gauge,
dsx1CurrentSEFSs
Gauge,
dsx1CurrentUASs
Gauge,
dsx1CurrentCSSs
Gauge,
dsx1CurrentPCVs
Gauge,
dsx1CurrentLESs
Gauge,
dsx1CurrentBESs
Gauge,
dsx1CurrentDMs
Gauge,
dsx1CurrentLCVs
Gauge
}
dsx1CurrentIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS1 interface to which this entry is applica-
ble. The interface identified by a particular
Trunk MIB Working Group [Page 23]
RFC 1406 DS1/E1 MIB January 1993
value of this index is the same interface as
identified by the same value as a dsx1LineIndex
object instance."
::= { dsx1CurrentEntry 1 }
dsx1CurrentESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Errored Seconds, encountered by
a DS1 interface in the current 15 minute inter-
val."
::= { dsx1CurrentEntry 2 }
dsx1CurrentSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Severely Errored Seconds encoun-
tered by a DS1 interface in the current 15
minute interval."
::= { dsx1CurrentEntry 3 }
dsx1CurrentSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Severely Errored Framing Seconds
encountered by a DS1 interface in the current
15 minute interval."
::= { dsx1CurrentEntry 4 }
dsx1CurrentUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Unavailable Seconds encountered
by a DS1 interface in the current 15 minute in-
terval."
::= { dsx1CurrentEntry 5 }
Trunk MIB Working Group [Page 24]
RFC 1406 DS1/E1 MIB January 1993
dsx1CurrentCSSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Controlled Slip Seconds encoun-
tered by a DS1 interface in the current 15
minute interval."
::= { dsx1CurrentEntry 6 }
dsx1CurrentPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Path Coding Violations encoun-
tered by a DS1 interface in the current 15
minute interval."
::= { dsx1CurrentEntry 7 }
dsx1CurrentLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Errored Seconds encountered
by a DS1 interface in the current 15 minute in-
terval."
::= { dsx1CurrentEntry 8 }
dsx1CurrentBESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the current
15 minute interval."
::= {dsx1CurrentEntry 9 }
dsx1CurrentDMs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
Trunk MIB Working Group [Page 25]
RFC 1406 DS1/E1 MIB January 1993
DESCRIPTION
"The number of Degraded Minutes (DMs) encoun-
tered by a DS1 interface in the current 15
minute interval."
::= { dsx1CurrentEntry 10 }
dsx1CurrentLCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Code Violations (LCVs) en-
countered by a DS1 interface in the current 15
minute interval."
::= {dsx1CurrentEntry 11 }
-- the DS1 Interval
-- The DS1 Interval Table contains various statistics
-- collected by each DS1 Interface over the previous 24 hours of
-- operation. The past 24 hours are broken into 96 completed
-- 15 minute intervals.
dsx1IntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1IntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS1 Interval table."
::= { ds1 8 }
dsx1IntervalEntry OBJECT-TYPE
SYNTAX Dsx1IntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS1 Interval table."
INDEX { dsx1IntervalIndex, dsx1IntervalNumber }
::= { dsx1IntervalTable 1 }
Dsx1IntervalEntry ::=
SEQUENCE {
dsx1IntervalIndex
INTEGER,
dsx1IntervalNumber
Trunk MIB Working Group [Page 26]
RFC 1406 DS1/E1 MIB January 1993
INTEGER,
dsx1IntervalESs
Gauge,
dsx1IntervalSESs
Gauge,
dsx1IntervalSEFSs
Gauge,
dsx1IntervalUASs
Gauge,
dsx1IntervalCSSs
Gauge,
dsx1IntervalPCVs
Gauge,
dsx1IntervalLESs
Gauge,
dsx1IntervalBESs
Gauge,
dsx1IntervalDMs
Gauge,
dsx1IntervalLCVs
Gauge
}
dsx1IntervalIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS1 interface to which this entry is applica-
ble. The interface identified by a particular
value of this index is the same interface as
identified by the same value as a dsx1LineIndex
object instance."
::= { dsx1IntervalEntry 1 }
dsx1IntervalNumber OBJECT-TYPE
SYNTAX INTEGER (1..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A number between 1 and 96, where 1 is the most
recently completed 15 minute interval and 96 is
the least recently completed 15 minutes inter-
val (assuming that all 96 intervals are
valid)."
::= { dsx1IntervalEntry 2 }
Trunk MIB Working Group [Page 27]
RFC 1406 DS1/E1 MIB January 1993
dsx1IntervalESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Errored Seconds encountered by a
DS1 interface in one of the previous 96, indi-
vidual 15 minute, intervals."
::= { dsx1IntervalEntry 3 }
dsx1IntervalSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Severely Errored Seconds encoun-
tered by a DS1 interface in one of the previous
96, individual 15 minute, intervals."
::= { dsx1IntervalEntry 4 }
dsx1IntervalSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Severely Errored Framing Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals."
::= { dsx1IntervalEntry 5 }
dsx1IntervalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Unavailable Seconds encountered
by a DS1 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx1IntervalEntry 6 }
dsx1IntervalCSSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
Trunk MIB Working Group [Page 28]
RFC 1406 DS1/E1 MIB January 1993
DESCRIPTION
"The number of Controlled Slip Seconds encoun-
tered by a DS1 interface in one of the previous
96, individual 15 minute, intervals."
::= { dsx1IntervalEntry 7 }
dsx1IntervalPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Path Coding Violations encoun-
tered by a DS1 interface in one of the previous
96, individual 15 minute, intervals."
::= { dsx1IntervalEntry 8 }
dsx1IntervalLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Errored Seconds encountered
by a DS1 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx1IntervalEntry 9 }
dsx1IntervalBESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals."
::= {dsx1IntervalEntry 10 }
dsx1IntervalDMs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Degraded Minutes (DMs) encoun-
tered by a DS1 interface in one of the previous
96, individual 15 minute, intervals."
Trunk MIB Working Group [Page 29]
RFC 1406 DS1/E1 MIB January 1993
::= { dsx1IntervalEntry 11 }
dsx1IntervalLCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Code Violations (LCVs) en-
countered by a DS1 interface in the current 15
minute interval."
::= {dsx1IntervalEntry 12 }
-- the DS1 Total
-- The DS1 Total Table contains the cumulative sum of the
-- various statistics for the 24 hour period preceding the
-- current interval.
dsx1TotalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1TotalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS1 Total table. 24 hour interval."
::= { ds1 9 }
dsx1TotalEntry OBJECT-TYPE
SYNTAX Dsx1TotalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS1 Total table."
INDEX { dsx1TotalIndex }
::= { dsx1TotalTable 1 }
Dsx1TotalEntry ::=
SEQUENCE {
dsx1TotalIndex
INTEGER,
dsx1TotalESs
Gauge,
dsx1TotalSESs
Gauge,
dsx1TotalSEFSs
Gauge,
Trunk MIB Working Group [Page 30]
RFC 1406 DS1/E1 MIB January 1993
dsx1TotalUASs
Gauge,
dsx1TotalCSSs
Gauge,
dsx1TotalPCVs
Gauge,
dsx1TotalLESs
Gauge,
dsx1TotalBESs
Gauge,
dsx1TotalDMs
Gauge,
dsx1TotalLCVs
Gauge
}
dsx1TotalIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS1 interface to which this entry is applica-
ble. The interface identified by a particular
value of this index is the same interface as
identified by the same value as a dsx1LineIndex
object instance."
::= { dsx1TotalEntry 1 }
dsx1TotalESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Errored Seconds encountered by a
DS1 interface in the previous 24 hour interval"
::= { dsx1TotalEntry 2 }
dsx1TotalSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Severely Errored Seconds encoun-
tered by a DS1 interface in the previous 24
hour interval."
Trunk MIB Working Group [Page 31]
RFC 1406 DS1/E1 MIB January 1993
::= { dsx1TotalEntry 3 }
dsx1TotalSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Severely Errored Framing Seconds
encountered by a DS1 interface in the previous
24 hour interval."
::= { dsx1TotalEntry 4 }
dsx1TotalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Unavailable Seconds encountered
by a DS1 interface in the previous 24 hour in-
terval."
::= { dsx1TotalEntry 5 }
dsx1TotalCSSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Controlled Slip Seconds encoun-
tered by a DS1 interface in the previous 24
hour interval."
::= { dsx1TotalEntry 6 }
dsx1TotalPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Path Coding Violations encoun-
tered by a DS1 interface in the previous 24
hour interval."
::= { dsx1TotalEntry 7 }
Trunk MIB Working Group [Page 32]
RFC 1406 DS1/E1 MIB January 1993
dsx1TotalLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Errored Seconds encountered
by a DS1 interface in the previous 24 hour in-
terval."
::= { dsx1TotalEntry 8 }
dsx1TotalBESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the previous
24 hour interval."
::= { dsx1TotalEntry 9 }
dsx1TotalDMs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Degraded Minutes (DMs) encoun-
tered by a DS1 interface in the previous 24
hour interval."
::= { dsx1TotalEntry 10 }
dsx1TotalLCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Line Code Violations (LCVs) en-
countered by a DS1 interface in the current 15
minute interval."
::= {dsx1TotalEntry 11 }
-- The DS1 Far End Group
-- Implementation of this group is optional for all systems
-- that attach to a DS1 Interface.
Trunk MIB Working Group [Page 33]
RFC 1406 DS1/E1 MIB January 1993
-- The DS1 Far End Group consists of three tables:
-- DS1 Far End Current
-- DS1 Far End Interval
-- DS1 Far End Total
-- The DS1 Far End Current Table
-- The DS1 Far End Current table contains various statistics
-- being collected for the current 15 minute interval.
-- The statistics are collected from the far end messages on the
-- Facilities Data Link. The definitions are the same as
-- described for the near-end information.
dsx1FarEndCurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FarEndCurrentEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS1 Far End Current table."
::= { ds1 10 }
dsx1FarEndCurrentEntry OBJECT-TYPE
SYNTAX Dsx1FarEndCurrentEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS1 Far End Current table."
INDEX { dsx1FarEndCurrentIndex }
::= { dsx1FarEndCurrentTable 1 }
Dsx1FarEndCurrentEntry ::=
SEQUENCE {
dsx1FarEndCurrentIndex
INTEGER,
dsx1FarEndTimeElapsed
INTEGER,
dsx1FarEndValidIntervals
INTEGER,
dsx1FarEndCurrentESs
Gauge,
dsx1FarEndCurrentSESs
Gauge,
dsx1FarEndCurrentSEFSs
Gauge,
dsx1FarEndCurrentUASs
Gauge,
dsx1FarEndCurrentCSSs
Trunk MIB Working Group [Page 34]
RFC 1406 DS1/E1 MIB January 1993
Gauge,
dsx1FarEndCurrentLESs
Gauge,
dsx1FarEndCurrentPCVs
Gauge,
dsx1FarEndCurrentBESs
Gauge,
dsx1FarEndCurrentDMs
Gauge
}
dsx1FarEndCurrentIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS1 interface to which this entry is applica-
ble. The interface identified by a particular
value of this index is the same interface as
identified by the same value an dsx1LineIndex
object instance."
::= { dsx1FarEndCurrentEntry 1 }
dsx1FarEndTimeElapsed OBJECT-TYPE
SYNTAX INTEGER (0..899)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of seconds that have elapsed
since the beginning of the far end current
error-measurement period."
::= { dsx1FarEndCurrentEntry 2 }
dsx1FarEndValidIntervals OBJECT-TYPE
SYNTAX INTEGER (0..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of previous far end intervals
for which valid data was collected. The
value will be 96 unless the interface was
brought online within the last 24 hours,
in which case the value will be the number
of complete 15 minute far end intervals
since the interface has been online."
Trunk MIB Working Group [Page 35]
RFC 1406 DS1/E1 MIB January 1993
::= { dsx1FarEndCurrentEntry 3 }
dsx1FarEndCurrentESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far Far End Errored Seconds en-
countered by a DS1 interface in the current 15
minute interval."
::= { dsx1FarEndCurrentEntry 4 }
dsx1FarEndCurrentSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Severely Errored Seconds
encountered by a DS1 interface in the current
15 minute interval."
::= { dsx1FarEndCurrentEntry 5 }
dsx1FarEndCurrentSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Severely Errored Framing
Seconds encountered by a DS1 interface in the
current 15 minute interval."
::= { dsx1FarEndCurrentEntry 6 }
dsx1FarEndCurrentUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Unavailable Seconds encountered
by a DS1 interface in the current 15 minute in-
terval."
::= { dsx1FarEndCurrentEntry 7 }
Trunk MIB Working Group [Page 36]
RFC 1406 DS1/E1 MIB January 1993
dsx1FarEndCurrentCSSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Controlled Slip Seconds
encountered by a DS1 interface in the current
15 minute interval."
::= { dsx1FarEndCurrentEntry 8 }
dsx1FarEndCurrentLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Line Errored Seconds en-
countered by a DS1 interface in the current 15
minute interval."
::= { dsx1FarEndCurrentEntry 9 }
dsx1FarEndCurrentPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Path Coding Violations
reported via the far end block error count en-
countered by a DS1 interface in the current 15
minute interval."
::= { dsx1FarEndCurrentEntry 10 }
dsx1FarEndCurrentBESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the current
15 minute interval."
::= {dsx1FarEndCurrentEntry 11 }
dsx1FarEndCurrentDMs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
Trunk MIB Working Group [Page 37]
RFC 1406 DS1/E1 MIB January 1993
STATUS mandatory
DESCRIPTION
"The number of Degraded Minutes (DMs) encoun-
tered by a DS1 interface in the current 15
minute interval."
::= { dsx1FarEndCurrentEntry 12 }
-- The DS1 Far End Interval Table
-- The DS1 Far End Interval Table contains various statistics
-- collected by each DS1 interface over the previous 24 hours of
-- operation. The past 24 hours are broken into 96
-- completed 15 minute intervals.
dsx1FarEndIntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FarEndIntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS1 Far End Interval table."
::= { ds1 11 }
dsx1FarEndIntervalEntry OBJECT-TYPE
SYNTAX Dsx1FarEndIntervalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS1 Far End Interval table."
INDEX { dsx1FarEndIntervalIndex,
dsx1FarEndIntervalNumber }
::= { dsx1FarEndIntervalTable 1 }
Dsx1FarEndIntervalEntry ::=
SEQUENCE {
dsx1FarEndIntervalIndex
INTEGER,
dsx1FarEndIntervalNumber
INTEGER,
dsx1FarEndIntervalESs
Gauge,
dsx1FarEndIntervalSESs
Gauge,
dsx1FarEndIntervalSEFSs
Gauge,
dsx1FarEndIntervalUASs
Gauge,
Trunk MIB Working Group [Page 38]
RFC 1406 DS1/E1 MIB January 1993
dsx1FarEndIntervalCSSs
Gauge,
dsx1FarEndIntervalLESs
Gauge,
dsx1FarEndIntervalPCVs
Gauge,
dsx1FarEndIntervalBESs
Gauge,
dsx1FarEndIntervalDMs
Gauge
}
dsx1FarEndIntervalIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS1 interface to which this entry is applica-
ble. The interface identified by a particular
value of this index is the same interface as
identified by the same value as a dsx1LineIndex
object instance."
::= { dsx1FarEndIntervalEntry 1 }
dsx1FarEndIntervalNumber OBJECT-TYPE
SYNTAX INTEGER (1..96)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A number between 1 and 96, where 1 is the most
recently completed 15 minute interval and 96 is
the least recently completed 15 minutes inter-
val (assuming that all 96 intervals are
valid)."
::= { dsx1FarEndIntervalEntry 2 }
dsx1FarEndIntervalESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Errored Seconds encoun-
tered by a DS1 interface in one of the previous
96, individual 15 minute, intervals."
::= { dsx1FarEndIntervalEntry 3 }
Trunk MIB Working Group [Page 39]
RFC 1406 DS1/E1 MIB January 1993
dsx1FarEndIntervalSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Severely Errored Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals."
::= { dsx1FarEndIntervalEntry 4 }
dsx1FarEndIntervalSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Severely Errored Framing
Seconds encountered by a DS1 interface in one
of the previous 96, individual 15 minute, in-
tervals."
::= { dsx1FarEndIntervalEntry 5 }
dsx1FarEndIntervalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Unavailable Seconds encountered
by a DS1 interface in one of the previous 96,
individual 15 minute, intervals."
::= { dsx1FarEndIntervalEntry 6 }
dsx1FarEndIntervalCSSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Controlled Slip Seconds
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals."
::= { dsx1FarEndIntervalEntry 7 }
dsx1FarEndIntervalLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
Trunk MIB Working Group [Page 40]
RFC 1406 DS1/E1 MIB January 1993
STATUS mandatory
DESCRIPTION
"The number of Far End Line Errored Seconds en-
countered by a DS1 interface in one of the pre-
vious 96, individual 15 minute, intervals."
::= { dsx1FarEndIntervalEntry 8 }
dsx1FarEndIntervalPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Path Coding Violations
reported via the far end block error count en-
countered by a DS1 interface in one of the pre-
vious 96, individual 15 minute, intervals."
::= { dsx1FarEndIntervalEntry 9 }
dsx1FarEndIntervalBESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in one of the
previous 96, individual 15 minute, intervals."
::= {dsx1FarEndIntervalEntry 10 }
dsx1FarEndIntervalDMs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Degraded Minutes (DMs) encoun-
tered by a DS1 interface in one of the previous
96, individual 15 minute, intervals."
::= { dsx1FarEndIntervalEntry 11 }
-- The DS1 Far End Total Table
-- The DS1 Far End Total Table contains the cumulative sum of the
-- various statistics for the 24 hour period preceding the
-- current interval.
Trunk MIB Working Group [Page 41]
RFC 1406 DS1/E1 MIB January 1993
dsx1FarEndTotalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FarEndTotalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS1 Far End Total table."
::= { ds1 12 }
dsx1FarEndTotalEntry OBJECT-TYPE
SYNTAX Dsx1FarEndTotalEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS1 Far End Total table."
INDEX { dsx1FarEndTotalIndex }
::= { dsx1FarEndTotalTable 1 }
Dsx1FarEndTotalEntry ::=
SEQUENCE {
dsx1FarEndTotalIndex
INTEGER,
dsx1FarEndTotalESs
Gauge,
dsx1FarEndTotalSESs
Gauge,
dsx1FarEndTotalSEFSs
Gauge,
dsx1FarEndTotalUASs
Gauge,
dsx1FarEndTotalCSSs
Gauge,
dsx1FarEndTotalLESs
Gauge,
dsx1FarEndTotalPCVs
Gauge,
dsx1FarEndTotalBESs
Gauge,
dsx1FarEndTotalDMs
Gauge
}
dsx1FarEndTotalIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
Trunk MIB Working Group [Page 42]
RFC 1406 DS1/E1 MIB January 1993
DS1 interface to which this entry is applica-
ble. The interface identified by a particular
value of this index is the same interface as
identified by the same value an dsx1LineIndex
object instance."
::= { dsx1FarEndTotalEntry 1 }
dsx1FarEndTotalESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Errored Seconds encoun-
tered by a DS1 interface in the previous 24
hour interval."
::= { dsx1FarEndTotalEntry 2 }
dsx1FarEndTotalSESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Severely Errored Seconds
encountered by a DS1 interface in the previous
24 hour interval."
::= { dsx1FarEndTotalEntry 3 }
dsx1FarEndTotalSEFSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Severely Errored Framing
Seconds encountered by a DS1 interface in the
previous 24 hour interval."
::= { dsx1FarEndTotalEntry 4 }
dsx1FarEndTotalUASs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Unavailable Seconds encountered
by a DS1 interface in the previous 24 hour in-
Trunk MIB Working Group [Page 43]
RFC 1406 DS1/E1 MIB January 1993
terval."
::= { dsx1FarEndTotalEntry 5 }
dsx1FarEndTotalCSSs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Controlled Slip Seconds
encountered by a DS1 interface in the previous
24 hour interval."
::= { dsx1FarEndTotalEntry 6 }
dsx1FarEndTotalLESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Line Errored Seconds en-
countered by a DS1 interface in the previous 24
hour interval."
::= { dsx1FarEndTotalEntry 7 }
dsx1FarEndTotalPCVs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Far End Path Coding Violations
reported via the far end block error count en-
countered by a DS1 interface in the previous 24
hour interval."
::= { dsx1FarEndTotalEntry 8 }
dsx1FarEndTotalBESs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the previous
24 hour interval."
::= { dsx1FarEndTotalEntry 9 }
Trunk MIB Working Group [Page 44]
RFC 1406 DS1/E1 MIB January 1993
dsx1FarEndTotalDMs OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Degraded Minutes (DMs) encoun-
tered by a DS1 interface in the previous 24
hour interval."
::= { dsx1FarEndTotalEntry 10 }
-- the DS1 Fractional Group
-- Implementation of this group is mandatory for those
-- systems dividing a DS1 into channels containing different
-- data streams that are of local interest. Systems which
-- are indifferent to data content, such as CSUs, need not
-- implement it.
-- The DS1 fractional table identifies which DS1 channels
-- associated with a CSU are being used to support a
-- logical interface, i.e., an entry in the interfaces table
-- from the Internet-standard MIB.
-- For example, consider an application managing a North
-- American ISDN Primary Rate link whose division is a 384 kbit/s
-- H1 "B" Channel for Video, a second H1 for data to a primary
-- routing peer, and 12 64 kbit/s H0 "B" Channels. Consider that
-- some subset of the H0 channels are used for voice and the
-- remainder are available for dynamic data calls.
-- we count a total of 14 interfaces multiplexed onto the DS1
-- interface. Six DS1 channels (for the sake of the example,
-- channels 1..6) are used for Video, six more (7..11 and 13)
-- are used for data, and the remaining 12 are are in channels
-- 12 and 14..24.
-- Let us further imagine that ifIndex 2 is of type DS1 and
-- refers to the DS1 interface, and that the interfaces layered
-- onto it are numbered 3..16.
-- We might describe the allocation of channels, in the
-- dsx1FracTable, as follows:
-- dsx1FracIfIndex.2. 1 = 3 dsx1FracIfIndex.2.13 = 4
-- dsx1FracIfIndex.2. 2 = 3 dsx1FracIfIndex.2.14 = 6
-- dsx1FracIfIndex.2. 3 = 3 dsx1FracIfIndex.2.15 = 7
-- dsx1FracIfIndex.2. 4 = 3 dsx1FracIfIndex.2.16 = 8
Trunk MIB Working Group [Page 45]
RFC 1406 DS1/E1 MIB January 1993
-- dsx1FracIfIndex.2. 5 = 3 dsx1FracIfIndex.2.17 = 9
-- dsx1FracIfIndex.2. 6 = 3 dsx1FracIfIndex.2.18 = 10
-- dsx1FracIfIndex.2. 7 = 4 dsx1FracIfIndex.2.19 = 11
-- dsx1FracIfIndex.2. 8 = 4 dsx1FracIfIndex.2.20 = 12
-- dsx1FracIfIndex.2. 9 = 4 dsx1FracIfIndex.2.21 = 13
-- dsx1FracIfIndex.2.10 = 4 dsx1FracIfIndex.2.22 = 14
-- dsx1FracIfIndex.2.11 = 4 dsx1FracIfIndex.2.23 = 15
-- dsx1FracIfIndex.2.12 = 5 dsx1FracIfIndex.2.24 = 16
-- For North American (DS1) interfaces, there are 24 legal
-- channels, numbered 1 through 24.
-- For G.704 interfaces, there are 31 legal channels,
-- numbered 1 through 31. The channels (1..31) correspond
-- directly to the equivalently numbered time-slots.
dsx1FracTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1FracEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The DS1 Fractional table."
::= { ds1 13 }
dsx1FracEntry OBJECT-TYPE
SYNTAX Dsx1FracEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the DS1 Fractional table."
INDEX { dsx1FracIndex, dsx1FracNumber }
::= { dsx1FracTable 1 }
Dsx1FracEntry ::=
SEQUENCE {
dsx1FracIndex
INTEGER,
dsx1FracNumber
INTEGER,
dsx1FracIfIndex
INTEGER
}
dsx1FracIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
Trunk MIB Working Group [Page 46]
RFC 1406 DS1/E1 MIB January 1993
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The index value which uniquely identifies the
DS1 interface to which this entry is applica-
ble. The interface identified by a particular
value of this index is the same interface as
identified by the same value an dsx1LineIndex
object instance."
::= { dsx1FracEntry 1 }
dsx1FracNumber OBJECT-TYPE
SYNTAX INTEGER (1..31)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The channel number for this entry."
::= { dsx1FracEntry 2 }
dsx1FracIfIndex OBJECT-TYPE
SYNTAX INTEGER (1..'7fffffff'h)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"An index value that uniquely identifies an in-
terface. The interface identified by a partic-
ular value of this index is the same interface
as identified by the same value an ifIndex ob-
ject instance. If no interface is currently us-
ing a channel, the value should be zero. If a
single interface occupies more than one time
slot, that ifIndex value will be found in mul-
tiple time slots."
::= { dsx1FracEntry 3 }
END
5. Acknowledgements
This document was produced by the Trunk MIB Working Group:
Tracy Cox Bellcore
Fred Baker Advanced Computer Communications
James Watt Newbridge
Bill Versteeg Versteeg Codeworks
Steve Buchko Newbridge
Trunk MIB Working Group [Page 47]
RFC 1406 DS1/E1 MIB January 1993
Greg Celmainis Newbridge
Kaj Tesink Bellcore
Al Bryenton Bell Northern Research
Tom Easterday CIC
John Labbe Merit Corporation
Chris Sullivan Gandalf Ltd
Grant Hall Gandalf Ltd
Laurence V. Marks, IBM Corp.
Kurt Hall, Clear Communications Corp.
Myron Hattig, ADC Kentrox
Tracy Cox, Bill Versteeg, Myron Hattig, Kurt Hall and Laurence Marks
especially worked to make the document what it is.
6. References
[1] Rose M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based internets", STD 16, RFC
1155, Performance Systems International, Hughes LAN Systems, May
1990.
[2] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
STD 16, RFC 1212, Performance Systems International, Hughes LAN
Systems, March 1991.
[3] McCloghrie K., and M. Rose, "Management Information Base for
Network Management of TCP/IP-based internets", RFC 1156, Hughes
LAN Systems, Performance Systems International, May 1990.
[4] McCloghrie K., and M. Rose, Editors, "Management Information Base
for Network Management of TCP/IP-based internets", STD 17, RFC
1213, Performance Systems International, March 1991.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, SNMP Research,
Performance Systems International, Performance Systems
International, MIT Laboratory for Computer Science, May 1990.
[6] Information processing systems - Open Systems Interconnection -
Specification of Abstract Syntax Notation One (ASN.1),
International Organization for Standardization, International
Standard 8824, December 1987.
[7] Information processing systems - Open Systems Interconnection -
Specification of Basic Encoding Rules for Abstract Notation One
(ASN.1), International Organization for Standardization,
International Standard 8825, December 1987.
Trunk MIB Working Group [Page 48]
RFC 1406 DS1/E1 MIB January 1993
[8] AT&T Information Systems, AT&T ESF DS1 Channel Service Unit
User's Manual, 999-100-305, February 1988.
[9] AT&T Technical Reference, Requirements for Interfacing Digital
Terminal Equipment to Services Employing the Extended Superframe
Format, Publication 54016, May 1988.
[10] American National Standard for Telecommunications -- Carrier-to-
Customer Installation - DS1 Metallic Interface, T1.403, February
1989.
[11] CCITT Specifications Volume III, Recommendation G.703,
Physical/Electrical Characteristics of Hierarchical Digital
Interfaces, July 1988.
[12] CCITT Specifications Volume III, Recommendation G.704,
Synchronous frame structures used at primary and secondary
hierarchical levels, July 1988.
[13] American National Standard for Telecommunications -- Layer 1 In-
Service Digital Transmission Performance Monitoring T1M1/92-0xx,
T1M1.3/92-005R1, April 1992.
[14] CCITT Specifications Volume IV, Recommendation O.162, Equipment
To Perform In Service Monitoring On 2048 kbit/s Signals, July
1988
[15] CCITT Specifications Volume III, Recommendation G.821, Error
Performance Of An International Digital Connection Forming Part
Of An Integrated Services Digital Network, July 1988.
[16] AT&T Technical Reference, Technical Reference 62411, ACCUNET T1.5
Service Description And Interface Specification, December 1990.
[17] CCITT Specifications Volume III, Recommendation G.706, Frame
Alignment and Cyclic Redundancy Check (CRC) Procedures Relating
to Basic Frame Structures Defined in Recommendation G.704, July
1988.
[18] CCITT Specifications Volume III, Recommendation G.732,
Characteristics Of Primary PCM Multiplex Equipment Operating at
2048 kbit/s, July 1988.
Trunk MIB Working Group [Page 49]
RFC 1406 DS1/E1 MIB January 1993
Security Considerations
Security issues are not discussed in this memo.
Authors' Addresses
Fred Baker
Advanced Computer Communications
315 Bollay Drive
Santa Barbara, California 93117
Phone: (805) 685-4455
EMail: fbaker@acc.com
James Watt
Newbridge Networks Corporation
600 March Road
Kanata, Ontario
Canada K2K 2E6
Phone: (613) 591-3600
EMail: james@newbridge.com
Trunk MIB Working Group [Page 50]
|