Strange route selection (defroute and specific)

Nico Schottelius nico.schottelius at ungleich.ch
Thu Nov 20 11:25:45 CET 2025


Hello bird users,

on one pop we have a "funky" routing selection by bird:

bird> show route all  for 185.203.114.92
Table master4:
0.0.0.0/0            unreachable [defroutev4 2025-10-30] * (200)
        preference: 200
        source: static
        Internal route handling values: 0L 5G 0S id 1
185.203.114.0/23     unicast [incoming_server122 10:21:13.232] * (100) [AS213081i]
        via 2a0a:e5c0:74:1::2 on iserver122
        preference: 100
        igp_metric: 0
        from: 2a0a:e5c0:74:1::2
        source: BGP
        bgp_origin: IGP
        bgp_path: 213081
        bgp_next_hop: 2a0a:e5c0:74:1::2
        bgp_local_pref: 100
        Internal route handling values: 0L 10G 2S id 227979

The strange thing is that the default route, that is only created for
exporting to others, has a higher preference.

The default route is defined as follows:

protocol static defroutev4 {
    ipv4;

    route 0.0.0.0/0 unreachable;
}

Why is that the case? And what does it mean if bird has a "*" for both
routes? I thought only the active one is selected with a *?

Any hints appreciated,

Nico

--
Sustainable and modern Infrastructures by ungleich.ch


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