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

SEE ALSO

          bpf(2), bpftune(8),

                                                                                              BPFTUNE-IP-FRAG(8)