Public bug reported:

Hi, the IRC guys suggested to file a bug here with 'linux'.

# cat /proc/version_signature
Ubuntu 5.15.0-46.49-generic 5.15.39

Description:    Ubuntu 22.04.1 LTS
Release:        22.04


I'm not able to attach the lspci output - but it's happening on various 
hardware flavors (intel i350 nic, mellanox connectx-6, xeon/epyc cpu's, etc) so 
it doesn't look hardware related. If you want to know something hardware 
specific let me know.


$ ip rule show 
100:    from all lookup local
32766:  from all lookup main
32767:  from all lookup default

$ ping localhost -c3
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.044 ms
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.050 ms
64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.050 ms

--- localhost ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2040ms
rtt min/avg/max/mdev = 0.044/0.048/0.050/0.003 ms

$ ip link set dev eno1 down

$ ip link set dev eno1 up

$ ip rule show 
32766:  from all lookup main
32767:  from all lookup default
====> NO LOCAL 

$ ping localhost -c3
PING localhost (127.0.0.1) 56(84) bytes of data.

--- localhost ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2051ms

$ ip rule add from all lookup local pref 100

$ ip rule show 
100:    from all lookup local
32766:  from all lookup main
32767:  from all lookup default

$ ping localhost -c3
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.066 ms
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.054 ms
64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.050 ms

--- localhost ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2024ms
rtt min/avg/max/mdev = 0.050/0.056/0.066/0.006 ms

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1986987

Title:
  network interface down/up removes local lookup table from routing
  policy db

Status in linux package in Ubuntu:
  New

Bug description:
  Hi, the IRC guys suggested to file a bug here with 'linux'.

  # cat /proc/version_signature
  Ubuntu 5.15.0-46.49-generic 5.15.39

  Description:    Ubuntu 22.04.1 LTS
  Release:        22.04

  
  I'm not able to attach the lspci output - but it's happening on various 
hardware flavors (intel i350 nic, mellanox connectx-6, xeon/epyc cpu's, etc) so 
it doesn't look hardware related. If you want to know something hardware 
specific let me know.

  
  $ ip rule show 
  100:    from all lookup local
  32766:  from all lookup main
  32767:  from all lookup default

  $ ping localhost -c3
  PING localhost (127.0.0.1) 56(84) bytes of data.
  64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.044 ms
  64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.050 ms
  64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.050 ms

  --- localhost ping statistics ---
  3 packets transmitted, 3 received, 0% packet loss, time 2040ms
  rtt min/avg/max/mdev = 0.044/0.048/0.050/0.003 ms

  $ ip link set dev eno1 down

  $ ip link set dev eno1 up

  $ ip rule show 
  32766:  from all lookup main
  32767:  from all lookup default
  ====> NO LOCAL 

  $ ping localhost -c3
  PING localhost (127.0.0.1) 56(84) bytes of data.

  --- localhost ping statistics ---
  3 packets transmitted, 0 received, 100% packet loss, time 2051ms

  $ ip rule add from all lookup local pref 100

  $ ip rule show 
  100:    from all lookup local
  32766:  from all lookup main
  32767:  from all lookup default

  $ ping localhost -c3
  PING localhost (127.0.0.1) 56(84) bytes of data.
  64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.066 ms
  64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.054 ms
  64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.050 ms

  --- localhost ping statistics ---
  3 packets transmitted, 3 received, 0% packet loss, time 2024ms
  rtt min/avg/max/mdev = 0.050/0.056/0.066/0.006 ms

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