BIRD 3.1.x - "cli v2 attributes" - some attributes not shown in v2 format

Rob Lister rob at lonap.net
Sun Sep 7 11:20:50 CEST 2025


Hello,

I've enabled cli "/path/to/socket.ctl" { v2 attributes; } for backward 
compatibility, but
it looks like some of the attributes are not displayed in the v2 format:

(bgp_community and bgp_large_community)


91.xxx.xxx.xxx/22      unicast [pb_as65001_vli19999_ipv4 2025-09-06 
22:35:27] * (100) [AS65002i]
         via 5.57.82.xx on eth1
         Type: BGP univ
         BGP.origin: IGP
         BGP.as_path: 65001 65002
         BGP.next_hop: 5.57.82.xx
         BGP.local_pref: 100
         bgp_community: (65001,1) (65001,64702)
         bgp_large_community: (8330, 1000, 1) (8330, 1001, 1)


BIRD 2 shows it as:

         BGP.community:
         BGP.large_community:


I searched the code and it's in 
https://gitlab.nic.cz/labs/bird/-/blob/v3.1.3/proto/bgp/attrs.c

But I don't know any C, and it doesn't look like an "obvious" problem.

But this file is more than 3000 lines of code. So I ran away and hid.


Rob


-- 
Rob Lister
rob at lonap.net
+44 20 3137 8330


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