[FROG] ibgp regression on 8.5.2 ?

[mike tancsa]

Hi, I am guessing it is this commit ?

commit 231e4de73f46b9c75a07bf0144aafce18aeb3a55
Author: Donatas Abraitis <donatas at opensourcerouting.org>
Date:   Mon May 8 22:49:10 2023 +0300

     bgpd: Make sure AIGP attribute is non-transitive

     The AIGP attribute is an optional, non-transitive BGP path attribute.

     Signed-off-by: Donatas Abraitis <donatas at opensourcerouting.org>


Is there a way to work around this in configs ?

     ---Mike

On 6/29/2023 2:39 PM, mike tancsa wrote:
> I was updating an internal distribution router that got wedged in 
> vtysh from 8.5 to 8.5.2 and found all my ibgp peers would not come up. 
> Same error on the half dozen peers
>
> Jun 29 14:00:55 ibgp-4 bgpd[38150]: [HZN6M-XRM1G] %NOTIFICATION: 
> received from neighbor xx.yy.zz.251 3/4 (UPDATE Message 
> Error/Attribute Flags Error) 14 bytes 80 1a 0b 01 00 0b 00 00 00 00 00 
> 00 00 01
> Jun 29 14:01:00 ibgp-4 bgpd[38150]: [HZN6M-XRM1G] %NOTIFICATION: 
> received from neighbor xx.yy.zz.251 3/4 (UPDATE Message 
> Error/Attribute Flags Error) 14 bytes 80 1a 0b 01 00 0b 00 00 00 00 00 
> 00 00 01
> Jun 29 14:01:05 ibgp-4 bgpd[38150]: [HZN6M-XRM1G] %NOTIFICATION: sent 
> to neighbor xx.yy.zz.251 3/4 (UPDATE Message Error/Attribute Flags 
> Error) 14 bytes c0 1a 0b 01 0
>
> On the older versions of frr,
>
> [NYD0B-A3BTB][EC 33554433] AIGP attribute must be flagged as "Transitive"
> [HZN6M-XRM1G] %NOTIFICATION: sent to neighbor xx.yy.zz.241 3/4 (UPDATE 
> Message Error/Attribute Flags Error) 14 bytes 80 1a 0b 01 0
> [GW152-RVASS][EC 33554455] bgp_process_packet: BGP UPDATE receipt 
> failed for peer: xx.yy.zz.241
>
> I downgraded from 8.5.2 to 8.5.1 and all was good. Also, another peer 
> thats still running 7.x was fine with it all.
>
>
> Nothing special about the config. One of the untouched boxes running 8.5
>
>  neighbor THOTLAN peer-group
>  neighbor THOTLAN remote-as 11647
>  neighbor THOTLAN description Core1LanEx
>  neighbor THOTLAN update-source [dot.251]
>  neighbor .241 peer-group HOTLAN
>  neighbor .241 description The box the flipped out
>  neighbor .241 bfd
>   neighbor THOTLAN activate
>   neighbor THOTLAN next-hop-self
>   neighbor THOTLAN weight 111
>
> The box I tried to upgrade from 8.5 to 8.5.2 that then went back to 8.5.1
>
>  neighbor THOTLAN peer-group
>  neighbor THOTLAN remote-as 11647
>  neighbor THOTLAN update-source [dot.241]
>  neighbor THOTLAN timers 16 50
>  neighbor .251 description One of the many other peers that didnt like me
>  neighbor .251 bfd
>   neighbor THOTLAN activate
>   neighbor THOTLAN next-hop-self
>   neighbor THOTLAN soft-reconfiguration inbound
>   neighbor THOTLAN weight 109
>
>
>     ---Mike
>
>