Incoming connection rejected

[Maximilian Wilhelm]

Anno domini 2018 Julien Sansonnens scripsit:

Hi,

> I'm having a hard time trying to peer with some router over GRE tunnel. I'm
> using bird 1.6.4
> I have many GRE tunnels and BGP sessions is working fine on all of the them
> except one.
> 
> Session is locked on "Idle" state.
> Here are my logs:
> 
> 2018-04-25 15:22:00 <TRACE> carl: Waiting for fd00:1111::2 to become my
> neighbor
> 2018-04-25 15:22:02 <TRACE> carl: Incoming connection from fd00:1111::2
> (port 32967) rejected
[...]
> I can ping6 f d00:1111::2 withou problem. Tunnel looks OK to me.

> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on peer-carl, link-type LINUX_SLL (Linux cooked), capture size
> 262144 bytes
> 15:26:59.597762 IP6 fd00:1111::2.47991 > fd00:1111::1.bgp: Flags [S], seq
[...]

How are the IPs configured on the tunnel? Did you configure fd00:1111::2/64
and fd00:1111::1/64 or are both IPs /128 with a peer IP/route to the
other side? I've seen this issue with the latter configuration.

Best
Max
-- 
Alles sollte so einfach wie möglich gemacht sein.
Aber nicht einfacher.  (Einstein)