Multiple neighbours between same devices

10 Sep 2018

      I'm trying to setup between DUT<->Bird in same interface multiple iBGP
neighbours with DUT IP and routerID staying same, and Bird sourceIP
and table changing.

If I configure just 1, it works grand, the 2nd one won't come up. If I
change the order, the previous one which didn't work now works, and
previous which did work, now does not.

bird.conf:
router id 100.100.100.100;

filter f_export {
  accept;
}

template bgp clients {
  neighbor 204.42.112.1;
  local as 65000;
  neighbor as 65000;
  ipv4 {
    import none;
    export filter f_export;
    add paths rx;
  };
}

include "clients.conf";

clients.conf:

ipv4 table t_client1;
protocol bgp client1 from clients {
  router id 204.42.112.100;
  source address 204.42.112.100;
  ipv4 {
    table t_client1;
  };
}
include "routes/client1.conf";

ipv4 table t_client2;
protocol bgp client2 from clients {
  router id 204.42.112.101;
  source address 204.42.112.101;
  ipv4 {
    table t_client2;
  };
}
include "routes/client2.conf";

clients1.conf:
protocol static {
  ipv4 { table t_client1; };
  route 100.101.1.0/24 unreachable;
  route 100.101.2.0/24 unreachable {
    bgp_local_pref = 99;
  };
}

I'm running debugging on, and getting no complains.

I don't really have any idea how to debug this in 'birdc', everything
I check seems fine. I tried for heck of it 'strict bind;' no help.

bird: client1: Channel ipv4 connected to table t_client1
bird: client1: Initializing
bird: client2: Channel ipv4 connected to table t_client2
bird: client2: Initializing
bird: client1: Starting
bird: client1: State changed to start
bird: client2: Starting
bird: client2: State changed to start
bird: Started
bird: client1: Started
bird: client1: Connect delayed by 5 seconds
bird: client1: Connecting to 204.42.112.1 from local address 204.42.112.100
bird: client1: Connected
bird: client1: Sending OPEN(ver=4,as=65000,hold=240,id=cc2a7064)
bird: client1: Got OPEN(as=65000,hold=90,id=204.42.110.40)
bird: client1: Sending KEEPALIVE
bird: client1: Got KEEPALIVE
bird: client1: BGP session established
bird: client1: State changed to up
bird: client1: Got UPDATE
bird: client1 > filtered out 129.250.15.35/32 unreachable
bird: client1 > filtered out 198.64.6.173/32 unreachable
bird: client1 > filtered out 129.250.15.39/32 unreachable
bird: client1 > filtered out 129.250.15.40/32 unreachable
bird: client1 > filtered out 129.250.26.240/28 unreachable
bird: client1 > filtered out 129.250.35.250/32 unreachable
bird: client1 > filtered out 129.250.35.251/32 unreachable
bird: client1 > filtered out 129.250.38.61/32 unreachable
bird: client1 > filtered out 129.250.47.99/32 unreachable
bird: client1 > filtered out 129.250.48.0/24 unreachable
bird: client1 > filtered out 129.250.49.0/24 unreachable
bird: client1 > filtered out 157.238.66.224/27 unreachable
bird: client1 > filtered out 165.254.18.128/25 unreachable
bird: client1 > filtered out 165.254.19.128/25 unreachable
bird: client1 > filtered out 198.58.5.0/24 unreachable
bird: client1 > filtered out 198.64.6.107/32 unreachable
bird: client1 > filtered out 198.64.6.110/32 unreachable
bird: client1 > filtered out 198.64.6.116/32 unreachable
bird: client1 > filtered out 198.64.6.127/32 unreachable
bird: client1 > filtered out 198.64.6.205/32 unreachable
bird: client1 > filtered out 198.64.6.229/32 unreachable
bird: client1 > filtered out 202.47.30.113/32 unreachable
bird: client1 > filtered out 129.250.38.85/32 unreachable
bird: client1 > filtered out 198.64.6.151/32 unreachable
bird: client1 > filtered out 213.130.47.24/32 unreachable
bird: client1 > filtered out 66.129.224.37/32 unreachable
bird: client1 > filtered out 207.17.137.34/32 unreachable
bird: client1 > filtered out 129.250.38.101/32 unreachable
bird: client1 > filtered out 198.64.6.172/32 unreachable
bird: client1 > filtered out 203.105.73.118/32 unreachable
bird: client1 > filtered out 198.64.72.220/32 unreachable
bird: client1: Got UPDATE
bird: client1 > filtered out 204.42.111.0/25 unreachable
bird: client1 > filtered out 204.42.112.0/24 unreachable
bird: client1 > filtered out 204.42.110.40/32 unreachable
bird: client1 > filtered out 129.250.0.254/32 unreachable
bird: client1 > filtered out 129.250.0.255/32 unreachable
bird: client1: Got UPDATE
bird: client1: Got END-OF-RIB
bird: client1 < added 100.101.1.0/24 unreachable
bird: client1 < added 100.101.2.0/24 unreachable
bird: client1: Sending UPDATE
bird: client1: Sending UPDATE
bird: client1: Sending END-OF-RIB
bird: client1: Got UPDATE
bird: client1: Got UPDATE
bird: client1: Got KEEPALIVE
bird: client1: Sending KEEPALIVE
bird: client1: Got KEEPALIVE
bird: client1: Sending KEEPALIVE
bird: client1: Got KEEPALIVE
bird: client1: Sending KEEPALIVE
bird: client1: Got KEEPALIVE
bird: client1: Sending KEEPALIVE
bird: client1: Got KEEPALIVE
bird: client1: Sending KEEPALIVE

--
  ++ytti

Multiple neighbours between same devices

Saku Ytti