[78838] in North American Network Operators' Group
Re: Tier-2 reachability and multihoming
daemon@ATHENA.MIT.EDU (Joe Abley)
Wed Mar 23 23:31:01 2005
In-Reply-To: <Pine.LNX.4.61.0503240943380.18100@mars.cse.iitb.ac.in>
Cc: Nanog Mailing list <nanog@merit.edu>
From: Joe Abley <jabley@isc.org>
Date: Wed, 23 Mar 2005 23:29:52 -0500
To: G Pavan Kumar <pavanji@cse.iitb.ac.in>
Errors-To: owner-nanog@merit.edu
[cisco-nsp-request@ snipped, since it does not seem to belong]
Le 23 mars 2005, =E0 23:15, G Pavan Kumar a =E9crit :
> 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=20=
(e.g. 2 and 3 are transit customers of 1, 7 is a transit customer of 3=20=
and 4) then 4 has transit customers but no peering or transit. I would=20=
suggest this is not indicative of a realistic business plan in the real=20=
network.
Joe=
