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
