[24184] in North American Network Operators' Group
Re: OSPF multi-level hierarchy: Necessary at all?
daemon@ATHENA.MIT.EDU (Vadim Antonov)
Thu May 27 18:34:33 1999
Date: Thu, 27 May 1999 15:33:27 -0700
From: Vadim Antonov <avg@kotovnik.com>
To: tony1@home.net
Cc: nanog@merit.edu, zinin@amt.ru
Errors-To: owner-nanog-outgoing@merit.edu
Tony Li <tony1@home.net> wrote:
>I suspect that the main driver is not the amount of routing information
>in the gross sense, but the scalability of the protocol as the number of
>nodes increases.
There's a better solution: decrease the number of nodes by replacing
clusters with bigger boxes. This has an additional advantage of reducing
number of hops (and, consequently, latency variance).
K.I.S.S. rulez :)
--vadim
PS. Using DUAL or DASM instead of SPF helps, too -- these algorithms tend
to eliminate updates which "do not matter" unlike SPF-based algorithms
which have to inform everyone about local topology changes.
