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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