nanog mailing list archives
Re: question about AS relationship
From: Christopher Morrow <morrowc.lists () gmail com>
Date: Fri, 21 Feb 2014 00:59:01 -0500
On Fri, Feb 21, 2014 at 12:37 AM, Song Li <refresh.lsong () gmail com> wrote:
Thanks. In order to prevent route leaking, this imformation should be provided to providers. but another question, should the AS relationships between customer and its other neighbors (downstrem/peer/another provider) be private?
perhaps you should draw a little ascii art, I think you're asking: DS1 - customer - you - isp "can DS1's relationship to 'customer' be secret" no. well, not if they want: 1) to use a public ASN 2) use ip space which isn't part of 'customer' aggregate 3) want to be reachable on the internet It's safe to say that your goal as an ISP and a customer of an ISP, should be: "Make sure that all of my routes and the routes of my customers and their customers, that I'm expected to provide transit for, are in my ISP's filters." -chris (and as someelse pointed out: "If they use BGP and expect global reachabilty... then the information isn't private anyway.")
-- Sky LiOn Thursday, February 20, 2014 08:09:35 PM Christopher Morrow wrote:so, yes. pleass tell your upstream your customers so proper filtering can be automated and implemented. don't turn up bgp customers without filtering, that kills kittens.For all the leaking I've seen in the last four weeks (including a well-known operator that was involved in the Youtube/Pakistan saga + other well-known global operators that could be classified as "a reasonably large tier"), we're still a long way away ensuring all customer prefixes are filtered correctly at the inter-domain peering edge. A loooooooong way away... Mark.
Current thread:
- question about AS relationship Song Li (Feb 20)
- Re: question about AS relationship Christopher Morrow (Feb 20)
- Re: question about AS relationship Mark Tinka (Feb 20)
- Re: question about AS relationship Song Li (Feb 20)
- Re: question about AS relationship Mark Tinka (Feb 20)
- Re: question about AS relationship Christopher Morrow (Feb 20)
- Re: question about AS relationship Song Li (Feb 20)
- Re: question about AS relationship Mark Tinka (Feb 21)
- Re: question about AS relationship Song Li (Feb 21)
- Re: question about AS relationship Mark Tinka (Feb 20)
- Re: question about AS relationship Christopher Morrow (Feb 20)
- Re: question about AS relationship Mark Tinka (Feb 20)