From: Bob Sinclair (bob@bobsinclair.net)
Date: Sun Feb 17 2008 - 18:09:59 ARST
ladeegeek@gmail.com wrote:
> Can any one explain to me how the solution of using point to points on R1 that only have assoicated dlci's and no maps can ping R2 and R4?
>
> I used sub interfaceswith multpoint so I could specifically state which dlci went to R2 and which went to R4. I tried to ping r2 from r1 and was getting encap errors. r1 had a mulitpoint sub int and a frame-map.
>
> when i changed to match the NMC solution of point to point with just an associated dlci I was able to ping r2??
>
> doesn't make sense.
>
It is certainly odd! We have ip addresses from the same subnet on two
p-p frame subifs on R1, 172.16.124.1/24 and 172.16.124.2/24. If you do
show ip route you see 172.16.124.0/24 associated with both interfaces.
What sorts this out is the OSPF P-M network type, which models the
subnet as a collection of point-to-points.
HTH,
--Bob Sinclair CCIE 10427 CCSI 30427 www.netmasterclass.net
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