From: Tim Haines (thaines@xxxxxxxxxxxxxxxxx)
Date: Wed Oct 04 2000 - 10:10:29 GMT-3
Hi, All.
I realise that this may be somewhat "off-tangent" from the core-study of the
group, but I was wondering whether any of you had come across any scenarios
involving DECnet (inter) area routing over ISDN. I have been trying to do
this in our Lab (at the request of a customer) but I'm not convinced that it
can be done.
The idea is that the implementation uses ISDN as DDR (i.e. NOT a backup
scenario), but the Hello packets required for the adjacencies keep bringing
the link up every 15 seconds. Also, the fact that the DECnet address
(area.node) is a property of the box creates an interesting "Catch22"
situation in that how can you route traffic to unknown networks via a
next-hop node that you don't even know about because there is no adjacency
for it? I have thought about increasing the Hello interval, but my
understanding is that this is not a reliable packet and will therefore be
lost during the call set-up, so the adjacency will never be established.
All the example configurations I have seen seem to imply that DECnet over
DDR works for intra-area, not inter-area implementations. I have tried some
of these configs myself, but still have the dilemma of the level-1 Hellos
bringing up the link. Is there a way to suppress the Hellos or even
configure a static adjacency?
Any pointers greatly appreciated!
Thanks,
Tim.
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