mailing list archives
Re: AS announcement question (easy)
From: alex () yuriev com
Date: Mon, 4 Aug 2003 14:49:45 -0400 (EDT)
Hi, sorry for this low-level question, but at least I'm not posting in html.
My company owns a class C, and we're switching ISPs. The "new" provider is
telling us that they can start announcing, without us having to tell the old
provider to stop announcing. I.e., a 2-3 day period where both are
announcing our class C.
This conflicts with my extremely (admittedly)limited knowledge. Can someone
let me know if this is OK/not OK?
If you are going to have your link up to both providers during that time, it
would not be a problem. However, if your /24 is nailed into the tables of
your previous provider, and your link to that provider is down, then the old
provider will create a blackhole for /24 for anyone who prefers the path
presented by your old provider.
In general, one really *should* coordinate switching between providers if
ones' announcement is originated by the provider.
Thanks in advance,
(949) 574-8500 x261