Re: Inconsistent view of routers over a LAN

[Acee Lindem <[e-mail]>]

Cheng-Yin Lee wrote:
> Hello,
> Just got some private responses, perhaps I should clarify.
> This is in context of an emulated LAN, and I am not looking for a fix in
> routing protocols.

Hi Cheng-Yin,

What I've recommended in the past for these situations is to force
the routing protocol to view the underlying network as a P2MP
(Point-to-Multi-Point) network. Many vendors support this. For
example, in our implementation you'd simply configure:

   router ospf 1
    area 0
     interface backbone
      network-type point-to-multipoint
               o
               o
          < the rest of the OSPF config>
               o

Good Luck,
Acee


>
> Thanks
> Cheng-Yin
>
> Cheng-Yin Lee wrote:
>
>>Hello,
>>What happens if for some reason Router A can't reach Router B, but
>>Router C can reach A & B (and vice-versa), when Router A,B,C are
>>connected over a broadcast network or LAN.
>>
>>E.g. in the case for (OSPF and IS-IS) where:
>>i) C is the DR
>>ii) B is the DR
>>
>>Thanks
>>Cheng-Yin
>
>


--
Acee