Multiple OSPF adjacencies on same interface...

[Kristoffer Egefelt]

Yes - the reason is that this router is a VM with two passthrough NICs.
The hypervisor is connected to both Force10 routers/switches with LACP, so the VM needs to run linux bonding mode 2 to provide a bond0 interface to the VM.
Neighbourship then needs to be established to both routers on this bonded interface.

I tried to create neighbourship directly on the interfaces, but this does not work, I assume because the switches loadbalance traffic on the LACP portchannel.

I could create a neighbourship with a VRRP interface, but as I understand it this will not work due to different router-ids in case of failover.

So basically as I see it, this is the only way to make this work - unless you have another idea?

Thanks

Regards
Kristoffer


On 13/12/2013, at 17.37.29, Raphael Mazelier <raph at futomaki.net> wrote:

>> I?m trying to use a bonded interface on linux to connect to two routers, one router on each physical link, each with a /31 subnet.
>> Only one of the routers (Force10 S4810) forms adjacency with the linux host (whichever comes first), the other gets stuck in EXSTART
>> until I shut/no shut the link, then Bird creates adjacency with both routers.
> 
> What are you trying to do with this design ? It's rather strange.
> 
> -- 
> Raphael Mazelier
>