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December 2025

16 participants
12 discussions

RFC 4684 implementation in Bird
by Jerome Tollet (jtollet) 10 Dec '25

10 Dec '25

Hello Bird community, I was wondering if someone already considered the implementation of RFC 4684 in Bird. It's rather old but still helpful for some highly multi-tenant environments. Any advice on this would be much appreciated. Regards, Jerome

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LLGR De-Preferencing
by Matt Corallo 01 Dec '25

01 Dec '25

It appears bird (2.17.1) doesn't implement the required LLGR de-preferencing logic, eg in a simple test environment with LLGR and one (otherwise-preferred) session down, bird shows it as still selected even though it has the stale flag (see below). Is there any way to do the required de-preferencing with filters or would a patch to implement this be simple? Thanks. bird> show route for 69.59.18.0 all Table master4: 69.59.18.0/24 unicast [localsyncb 17:06:58.262 from 10.242.243.12] * (101s) [AS397444i] Type: BGP univ BGP.origin: IGP BGP.as_path: 397444 BGP.next_hop: .... BGP.local_pref: 101 BGP.community: (65535,6) unicast [localsync 2025-11-30 from 10.242.242.12] (100) [AS397444i] Type: BGP univ BGP.origin: IGP BGP.as_path: 397444 BGP.next_hop: .... BGP.local_pref: 100

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