[Xorp-hackers] OSPF stuck in TwoWay state.

[Ben Greear]

Is it ever valid for neighbors to be stuck in TwoWay
state?

I configured a set of 15 virtual routers w/OSPF connected in
interesting ways.  Most of the nodes are connected to a bridge
object (roughly directly connected), and other connections form
a mesh.  Most routers have several redundant paths through the network
between any two nodes.

Several of the instances connected across the bridge stay in TwoWay
state, but some of them work.  As far as I can tell, the hello messages
are being send properly even from the guys in TwoWay state.

I checked IP connectivity with traceroute, and it all seems to be right
(ie, node 99.1.1.6 should be able to talk to 99.1.1.3).

[root at lf1016-55 ~]# traceroute -n -i 3.16.3 99.1.1.6
traceroute to 99.1.1.6 (99.1.1.6), 30 hops max, 40 byte packets
  1  99.1.1.6  2.785 ms  2.768 ms  2.756 ms


Assuming its not normal for them to be in this state, can you
give me an idea of where to look to start debugging this?

root at lf1016-55> show ospf4 neighbor
   Address         Interface             State      ID              Pri  Dead
99.1.1.9         3.16.3/3.16.3          TwoWay    127.1.0.9        128    33
99.1.1.10        3.16.3/3.16.3          TwoWay    127.1.0.10       128    34
99.1.1.6         3.16.3/3.16.3          TwoWay    127.1.0.6        128    35
99.1.1.2         3.16.3/3.16.3          TwoWay    127.1.0.2        128    35
99.1.1.12        3.16.3/3.16.3          Full      127.1.0.12       128    36
99.1.1.11        3.16.3/3.16.3          Full      127.1.0.11       128    36
10.1.3.1         1.3.3/1.3.3            Full      127.1.0.1        128    30
10.2.3.2         2.3.3/2.3.3            Full      127.1.0.2        128    35
10.3.4.4         3.4.3/3.4.3            Full      127.1.0.4        128    31
10.3.5.5         3.5.3/3.5.3            Full      127.1.0.5        128    33
10.3.9.9         3.9.3/3.9.3            Full      127.1.0.9        128    34
root at lf1016-55>

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com