Yes its that IS-IS question again.
I am at the moment working on a National Management Network. Marconi
telecomms switches (SDH muxes) only talk to each other using the favourite
IS-IS protocol. Most of the design features / problems have been done BUT
there is one question that remains unanswered. HOW many Level 2 only
routers can you have in one area.
The situation is because the SDH is obviously in rings then the areas cannot
be geographically based. One ring can stretch through around 30 node sites.
There is more than one ring in each site (diversity). Anyway, the design is
going to be that all of the Cisco routers will be logically THE ISIS core
with the marconi ad-muxes the distribution layer (L1-L2) and the elements
on the ring the access layer (L1 only). This will then cause there to be
around 100 routers in the core all at LEVEL 2.
Does anyone know out there how many routers you can have in one area. I
have tried the Advanced IP Design and Routing TCP/IP volumes which were
advised from past emails (thanks Howard).
Any help as per usual will be well received.
Cheers
Robert McCallum
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