nanog mailing list archives
Re: AS announcement question (easy)
From: Mikael Abrahamsson <swmike () swm pp se>
Date: Mon, 4 Aug 2003 20:35:14 +0200 (CEST)
On Mon, 4 Aug 2003, Mike Donahue wrote:
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?
Originating the same prefix from two different ASes violates the RFC (or whatever bible you might pray to), but works most of the time. See "show ip bgp inconsistant-as" on cisco. YMMV. -- Mikael Abrahamsson email: swmike () swm pp se
Current thread:
- AS announcement question (easy) Mike Donahue (Aug 04)
- Re: AS announcement question (easy) Mikael Abrahamsson (Aug 04)
- Inconsistent AS, was Re: AS announcement question (easy) Rob Thomas (Aug 04)
- Inconsistant origins Joe Provo (Aug 04)
- Re: AS announcement question (easy) alex (Aug 04)
- <Possible follow-ups>
- RE: AS announcement question (easy) H. Michael Smith, Jr. (Aug 04)
- RE: AS announcement question (easy) Pete Templin (Aug 04)
- Re: AS announcement question (easy) Mikael Abrahamsson (Aug 04)