[50437] in North American Network Operators' Group
Re: routing table size
daemon@ATHENA.MIT.EDU (Brian)
Mon Jul 29 18:37:45 2002
Date: Mon, 29 Jul 2002 15:35:19 -0700 (PDT)
From: Brian <bri@sonicboom.org>
To: "Stephen J. Wilcox" <steve@opaltelecom.co.uk>
Cc: David Schwartz <davids@webmaster.com>, <ralph@istop.com>,
"nanog@merit.edu" <nanog@merit.edu>
In-Reply-To: <Pine.LNX.4.21.0207272255440.27179-100000@staff.opaltelecom.net>
Errors-To: owner-nanog-outgoing@merit.edu
the large quantity of /24 announcements is, I suspect, from comapnies just
large enough to want the benefits of multihoming. You know, 2 t1s on a
small router, and stuff like that..
Bri
On Sat, 27 Jul 2002, Stephen J. Wilcox wrote:
>
>
> I've a feeling that the fact that everyone shares at least the view that a /24
> is minimum helps to contain the routing table. (even if there are still
> thousands of /24 announcements)
>
> If a significant number of providers starting accepting any prefix then the
> others would need to follow (else they'd get no transit traffic as it will
> always prefer the most specific). This really would lead to route explosion!
>
> I guess the counter argument is that you'd still get the same number of
> announcements at longer prefixes as there are only lots of /24s as its the
> current shortest (if you catch my drift here). But I doubt it is quite that
> straight forward and there would be a growth in announcements..
>
> Steve
>
> On Sat, 27 Jul 2002, David Schwartz wrote:
>
> >
> >
> > >I've never suggested accepting /25's thru /32's. I'm wondering if the
> > >people saying I should not de-aggregage my /20 actually practice what they
> > >preach and filter /24's and don't globally announce /24's from their
> > >customers.
> > >
> > >-Ralph
> >
> > What's wrong with announcing routes from your customers? Even /32s if you
> > want. Only those people who choose to accept them will be affected by them
> > and anyone who you have a BGP session with can insist you filter them out.
> > Treating different situations as if they were the same is not practicing what
> > you preach.
> >
> > DS
> >
> >
> >
> >
> >
> >
>
