EoIP interface on bridge randomly goes inactive

RouterOS General
1

I have an EoIP tunnel between two RB1100, both running 5.14 with 2.30 firmware. On side A, the EoIP is on a bridge with an ethernet interface. On side B, the EoIP is bridged with a VLAN interface. None of these interfaces have IPs, and the EoIP tunnel was created between two loopback IPs on the devices. I’ve had no issues at all on side B. On side A, the EoIP interfaces will randomly show as inactive. I’ve found that if I change the bridge’s ARP setting from Enabled to Disabled (or vice versa), it comes back up.

Is there any way to see what is going on here, or why the EoIP goes inactive? Any particular logging I should enable?

2

Think I may have solved this one - I enabled a bunch of debug logging, found that every time it happens is in the middle of receiving BGP updates, so I suspect it may have tried to take a path to the remote IP from a different source IP. I just set the local address on the EoIP tunnel interface (not sure why I didn’t do that before) and it’s been solid ever since.

update: tunnel has been solid for three days now, it never lasted over 12 hours before.

3

Thanks for posting the solution.