[FROG] bgp view broken in 8.0 ?

[Philip Smith]

Hi everyone,

Is anyone using the "bgp view" feature in FRR at all?

I've been using this feature on FRR 7.5.1 on Ubuntu 20.04 for several 
months without issue.

The upgrade to FRR 8.0 that was pushed out the four weeks back broke all 
the BGP feeds that I have (basically for a routing analysis looking 
glass activity).

This is the an example of the configuration I'm using:

router bgp 65534 view I2
  bgp router-id 128.223.157.40
  bgp log-neighbor-changes
  no bgp default ipv4-unicast
  timers bgp 15 45
  neighbor 64.57.28.241 remote-as 11537
  neighbor 64.57.28.241 description I2
  neighbor 64.57.28.241 ebgp-multihop 255
  !
  address-family ipv4 unicast
   neighbor 64.57.28.241 activate
   neighbor 64.57.28.241 prefix-list DENY-ALL out
   neighbor 64.57.28.241 route-map IMPORT in
  exit-address-family
!

and I have around 30 BGP feeds, all going into different views.

If I use FRR 7.5.1, the BGP sessions are up and running just fine.

But in 8.0, they all sit there in "Connect" (IPv4 and IPv6). It looks 
like this, in a testbed of mine (I can't put the production system to 
FRR 8.0 unfortunately).

Configuration:

router bgp 131076 view C1100
  bgp router-id 192.168.1.230
  bgp log-neighbor-changes
  no bgp default ipv4-unicast
  neighbor 192.168.1.254 remote-as 131076
  neighbor 192.168.1.254 description Cisco C1100 Border
  !
  address-family ipv4 unicast
   distance bgp 200 200 200
   neighbor 192.168.1.254 activate
  exit-address-family
!

frr# sh bgp view C1100 sum

IPv4 Unicast Summary:
BGP router identifier 192.168.1.230, local AS number 131076 vrf-id 1
BGP table version 0
RIB entries 0, using 0 bytes of memory
Peers 1, using 727 KiB of memory

Neighbor        V         AS   MsgRcvd   MsgSent   TblVer  InQ OutQ 
Up/Down State/PfxRcd   PfxSnt Desc
192.168.1.254   4     131076         0         0        0    0    0 
never      Connect        0 Cisco

Total number of neighbors 1


If I revert to FRR 7.5.1 on the testbed, the peering comes up.

bgpd.log says this:

2021/08/27 14:42:12 ZEBRA: [VTVCM-Y2NW3] Configuration Read in Took: 
00:00:00
2021/08/27 14:42:12 BGP: [VTVCM-Y2NW3] Configuration Read in Took: 00:00:00
2021/08/27 14:42:12 STATIC: [VTVCM-Y2NW3] Configuration Read in Took: 
00:00:00

and frr.log has basically the same content.

The docs for bgpd don't seem to have changed and I can't find anything 
via the CLI that suggests the configuration is different in 8.0.

Any hints or tips or clues on how to fix this? Or is this a bug 
introduced in 8.0?

Thanks!

philip
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