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
|
*******************
BGP speaker library
*******************
Introduction
============
OS-Ken BGP speaker library helps you to enable your code to speak BGP
protocol. The library supports IPv4, IPv4 MPLS-labeled VPN, IPv6
MPLS-labeled VPN and L2VPN EVPN address families.
Example
=======
The following simple code creates a BGP instance with AS number 64512
and Router ID 10.0.0.1. It tries to establish a bgp session with a
peer (its IP is 192.168.177.32 and the AS number is 64513). The
instance advertizes some prefixes.
.. code-block:: python
import eventlet
# BGPSpeaker needs sockets patched
eventlet.monkey_patch()
# initialize a log handler
# this is not strictly necessary but useful if you get messages like:
# No handlers could be found for logger "os_ken.lib.hub"
import logging
import sys
log = logging.getLogger()
log.addHandler(logging.StreamHandler(sys.stderr))
from os_ken.services.protocols.bgp.bgpspeaker import BGPSpeaker
def dump_remote_best_path_change(event):
print 'the best path changed:', event.remote_as, event.prefix,\
event.nexthop, event.is_withdraw
def detect_peer_down(remote_ip, remote_as):
print 'Peer down:', remote_ip, remote_as
if __name__ == "__main__":
speaker = BGPSpeaker(as_number=64512, router_id='10.0.0.1',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down)
speaker.neighbor_add('192.168.177.32', 64513)
# uncomment the below line if the speaker needs to talk with a bmp server.
# speaker.bmp_server_add('192.168.177.2', 11019)
count = 1
while True:
eventlet.sleep(30)
prefix = '10.20.' + str(count) + '.0/24'
print "add a new prefix", prefix
speaker.prefix_add(prefix)
count += 1
if count == 4:
speaker.shutdown()
break
|
