hello,

recently i noticed some entries in syslog like this:

Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid NEXT_HOP attribute - 
neighbor address fd5b:a83:b06b:500::1
Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid route 172.20.212.0/26 
withdrawn
Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid NEXT_HOP attribute - 
neighbor address fd5b:a83:b06b:500::1
Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid route 172.20.212.0/26 
withdrawn
Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid NEXT_HOP attribute - 
neighbor address fd5b:a83:b06b:500::1
Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid route 172.20.212.0/26 
withdrawn
Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid NEXT_HOP attribute - 
neighbor address fd5b:a83:b06b:500::1
Mar 15 11:03:22 uk-myb-2 bird[60388]: nl-myb-1: Invalid route 172.20.212.0/26 
withdrawn

i am not sure how to understand this log message.

i still have the route (including via nl-myb-1):

root@uk-myb-2:~ # birdc show route 172.20.212.0/26
BIRD 2.16.1 ready.
Table master4:
172.20.212.0/26      unicast [uk-jmp-2 11:03:22.032 from fd5b:a83:b06b:400::1] 
* (100/61) [AS4242422622i]
        via fe80::e0e3:b1bf:8d1d:abcd on wg.nl-myb-1
                     unicast [nl-myb-1 11:03:20.704 from fd5b:a83:b06b:500::1] 
(100/61) [AS4242422622i]
        via fe80::e0e3:b1bf:8d1d:abcd on wg.nl-myb-1
                     unicast [ny-czy-1 11:03:20.589 from fd5b:a83:b06b:200::1] 
(100/694) [AS4242422622i]
        via fe80::bc1b:dbed:690a:6840 on wg.uk-jmp-2
                     unicast [mia-czy-1 11:03:20.680 from fd5b:a83:b06b:900::1] 
(100/694) [AS4242422622i]
        via fe80::bc1b:dbed:690a:6840 on wg.uk-jmp-2

and it's in the FIB as well:

root@uk-myb-2:~ # route -n get -inet 172.20.212.0/26
   route to: 172.20.212.0
destination: 172.20.212.0
       mask: 255.255.255.192
    gateway: fe80::e0e3:b1bf:8d1d:abcd%wg.nl-myb-1
        fib: 0
  interface: wg.nl-myb-1
      flags: <UP,GATEWAY,DONE>
 recvpipe  sendpipe  ssthresh  rtt,msec    mtu        weight    expire
       0         0         0         0      1420         1         0

so everything seems fine.

what is BIRD trying to indicate with this log message?

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