Re: Tier-2 reachability and multihoming

[cisco-nsp-request@ snipped, since it does not seem to belong] Le 23 mars 2005, à 23:15, G Pavan Kumar a écrit :

here, nodes 2 and 4 have no reachability, 1 / | 2 3 4 / \ \/ \ 5 6 7 8

now, node 7 is reachable from 2 and its lower level nodes, but what about node 4 and 8, and as a typical case, suppose nodes 4 and 8 have no multihoming whatsoever, what then?

If the verticial position on the page indicates some kind of hierarchy (e.g. 2 and 3 are transit customers of 1, 7 is a transit customer of 3 and 4) then 4 has transit customers but no peering or transit. I would suggest this is not indicative of a realistic business plan in the real network. Joe