[VPP-1688] ICMP replies getting dropped (vpe-icmp4-oam)

[vvalderrv]

Description

VPP version: v19.08-rc0~259-ga29d18ae6~b2822

 Setup:

vppctl create tap id 1 host-if-name tap1
vppctl set int ip addr tap1 10.10.1.2/24
vppctl set int state tap1 up
ip address add 10.10.1.1/24 dev tap

 Packet trace:

00:07:50:942530: virtio-input
  virtio: hw_if_index 2 next-index 4 vring 0 len 110
    hdr: flags 0x00 gso_type 0x00 hdr_len 0 gso_size 0 csum_start 0 csum_offset 0 num_buffers 1
00:07:50:942533: ethernet-input
  IP4: a2:e7:61:57:56:20 -> 02:fe:7f:3a:77:f5
00:07:50:942536: ip4-input
  ICMP: 10.20.1.1 -> 10.20.1.2
    tos 0x00, ttl 64, length 96, checksum 0xf226
    fragment id 0x724c
  ICMP echo_reply checksum 0xf47b
00:07:50:942540: ip4-lookup
  fib 0 dpo-idx 6 flow hash: 0x00000000
  ICMP: 10.20.1.1 -> 10.20.1.2
    tos 0x00, ttl 64, length 96, checksum 0xf226
    fragment id 0x724c
  ICMP echo_reply checksum 0xf47b
00:07:50:942542: ip4-local
    ICMP: 10.20.1.1 -> 10.20.1.2
      tos 0x00, ttl 64, length 96, checksum 0xf226
      fragment id 0x724c
    ICMP echo_reply checksum 0xf47b
00:07:50:942543: ip4-icmp-input
  ICMP: 10.20.1.1 -> 10.20.1.2
    tos 0x00, ttl 64, length 96, checksum 0xf226
    fragment id 0x724c
  ICMP echo_reply checksum 0xf47b
00:07:50:942544: vpe-icmp4-oam
  OAM: rx from address 10.20.1.1, target index -1
00:07:50:942547: error-drop
  rx:tap2
00:07:50:942548: drop
  vpe-icmp4-oam: icmp4 replies dropped (no registration)

This works okay with VPP 19.04.

Assignee

Unassigned

Reporter

Ondrej Fabry

Comments

• JIRAUSER15013 (Wed, 23 Feb 2022 09:13:20 +0000): Ondrej Fabry, this can be closed. I didn't manage to reproduce it.

Original issue: https://jira.fd.io/browse/VPP-1688