From: Howard C. Berkowitz (hcb@xxxxxxxxxxxx)
Date: Fri Aug 02 2002 - 19:17:05 GMT-3
At 2:37 PM -0700 8/2/02, Eric wrote:
>I work for a major ISP and we have never used an area 0, there are ways
>around this, as with all things in this buisness. Be careful of
>absolutes.
>
>~e
Well, if as most major ISPs do, you use ISIS as your IGP, you won't
have an area 0.0.0.0. If you only use IGPs at POPs and a statically
routed core, you might not need it either.
But I find it very difficult to rationalize a single area backbone
for a large ISP that doesn't use hierarchy. Yes, ISIS single areas
do scale to 1500-2000 routers, but this is highly unlikely for OSPF.
The question is why would you want to work around a very standard,
proven design approach, assuming that you use a pervasive IGP rather
than islands?
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:48:15 GMT-3