[SOLVED] loopback interface IP set via frr wiped when ifupdown2, ifreload, or pvesh set /nodes/pve1/network runs

S

scyto

Active Member
Aug 8, 2023
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I have been playing quite a bit with frr and sdn over the last few days, I was having really weird unreliability with my cpeh thunderbolt mesh network.

I eventually traced it to the the fact that:
  1. i set the loopback interface IP addresses with frr (instead of a /etc/network/interfaces file)
  2. when ifupdown2, ifreload, or pvesh set nodes/pve1/network runs it wipes out the addresses frr set
  3. frr doesn't seem to know the interface changes and won't reapply the interface settings automatically or when a service reload happens (but an frr restart works)
Solution:
  • set post-up sh -c 'sleep 5 && /usr/bin/systemctl restart frr.service'in the lo stanza in /etc/network/interfaces
Issues/Questions:
  1. i originally had a a script in /etc/network/if-up.d to bounce the service, but that didn't seem to process for interface lo (it works for interface en05 and en06 i have) - is the expected behaviour / a special conditions for the loopback (my google searches turned up no clear info on this)
  2. i don't really like modifying the /etc/network/interfaces file for the loopback so could move this to (i assume) and /etc/networks/interfaces.d/loopback file - would that have any downsides to proxmox
  3. is there a better / more elegant / more correct way to do this?
 
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