I can confirm that the issue is fixed on today's rolling release!

Bugfix just got merged into FRR codebase - next VyOS rolling ISO image will have the fix.

FRR bugreport filed https://github.com/FRRouting/frr/issues/10911

I'm not comfortable posting my config here for ever but I've uploaded it to ubuntu pastebin and set it to expire in a week: https://paste.ubuntu.com/p/BW5KxyjPQr/

Can not get it crashed here. Please share your full config.

Still seems to be broken on 1.4-rolling-202203270930

Re-run with the latest FRR code-base and it also seems to be fixed - please try the latest VyOS version ;)

Feels like the bug was introduced in https://github.com/FRRouting/frr/commit/36295a387c241d3dba7aaa305a1860a6a07ab0cf

@Cheeze_It It is not hard https://github.com/vyos/vyos-1x/blob/current/op-mode-definitions/show-bgp.xml.in

@Viacheslav, hmmm, yeah that's a good point. I'll see what I can do to add the OP configs. I know I added the conf configs.

@Cheeze_It There is a task for op-mode T4265
Task for controller T4266

@xrobau As I mentioned before, peer-group can't exist without peer-as/remote-as in your case remote-as should be internal. It can exist without remote-as but with "route-reflector-client" it shouldn't
You can check it with vtysh FRR:

You COULD have a peer-group without remote-as, as you could apply that peer group to multiple remotes, and override the remote-as. But that is an edge case. The BETTER way to handle it is to enforce having a remote-as -- especially if you enable route-reflector-client

@xrobau You have to set remote-as for peer-group or for neighbor

[email protected]# set protocols bgp 65001 peer-group FOO 
[edit]
[email protected]# set protocols bgp 65001 neighbor 203.0.113.2 peer-group FOO
[edit]
[email protected]# set protocols bgp 65001 neighbor 203.0.113.2 remote-as 65002
[edit]
[email protected]# commit
[edit]
[email protected]#

@Harliff Try 1.2.7/1.3 it was fixed with commit https://github.com/vyos/vyos-build/pull/138/files#diff-c7d29a506307d9cf8d86c3cd3f65ca4e4058ea442cacdf9a89d2485b56c7417aR67
T2061

I've not checked later versions. Maybe it was already fixed on 1.2.7 or 1.3/1.4 ?

Will be adding the BGP op commands for it as well eventually...

Already in 1.4

set protocols bgp address-family ipv4-flowspec

Fixed, VyOS 1.3-rolling-202007270117