Man page - bpftune-ip-frag(8)

Packages contains this manual

Package: bpftune
apt-get install bpftune

Manuals in package:

bpftune-sysctl(8)
bpftune(8)
bpftune-tcp-conn(8)
bpftune-neigh(8)
bpftune-net-buffer(8)
bpftune-tcp-buffer(8)
bpftune-ip-frag(8)
bpftune-netns(8)

Documentations in package:

bpftune

Manual

BPFTUNE-IP-FRAG

NAME
DESCRIPTION
SEE ALSO

NAME

BPFTUNE-IP-FRAG - IP fragmentation bpftune plugin for managing fragment reassembly memory limits

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