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
|
===============
BPFTUNE-IP-FRAG
===============
-------------------------------------------------------------------------------
IP fragmentation bpftune plugin for managing fragment reassembly memory limits
-------------------------------------------------------------------------------
:Manual section: 8
DESCRIPTION
===========
For IPv[46] fragmentation reassembly, memory is capped at
net.ipv[46].ip[6]frag_high_thresh
Fragmentation reassembly can fail if this value is set too low;
monitor for fragmentation reassembly and bump value if needed.
Avoid bumping it if assembly failures are correlated with
increases in frag_high_thresh; this suggests that increasing
available memory does not help. While correlation is high,
tune down the frag_high_thresh value.
Tunables:
- net.ipv4.ipfrag_high_thresh: number of bytes devoted to
IPv4 fragmentation reassembly; default 4MB
- net.ipv6.ip6frag_high_thresh: number of bytes devoted to
IPv6 fragmentation reassembly; default 4MB
|
