nanog mailing list archives
Re: Long AS Path
From: James Bensley <jwbensley () gmail com>
Date: Sat, 24 Jun 2017 08:41:54 +0100
On 23 Jun 2017 17:03, "Mel Beckman" <mel () beckman org> wrote: James, The question is whether you would actually hear of any problems. Chances are that the problem would be experienced by somebody else, who has no idea that your filtering was causing it. -mel beckman Hi Mel, For us this the answer is almost definitely a yes. We are an MSP (managed service provider) as opportunities to a traditional ISP, so our customers know they can open a ticket with us for pretty much anything and we'll try and look into it. We have had some weird issues with far away sites, first line can't find any issue, it works it's way up to somebody who knows how to check if we would be filtering a route on our transit and peering sessions. Earlier when I said that care is required when filtering long AS_PATH routes or certain AS numbers, we looked at the BGP table to see exactly which routes we'd drop before hand and communicated out these changes. I think for an MSP this shouldn't be hard to implement and manage, I can appreciate for a "flat" ISP ("he's some transit, help yourself") it could be more challenging. In relation to the OPs question, long AS_PATH routes can be filtered I just wouldn't bother except for very long paths to drop as little as possible and be sure of whY you drop/filter. Cheers, James.
Current thread:
- Re: Long AS Path, (continued)
- Re: Long AS Path Mel Beckman (Jun 21)
- Re: Long AS Path Bob Evans (Jun 21)
- Re: Long AS Path Saku Ytti (Jun 21)
- Re: Long AS Path Jon Lewis (Jun 22)
- Re: Long AS Path Stephen Satchell (Jun 22)
- Re: Long AS Path Ryan L (Jun 23)
- Re: Long AS Path Mel Beckman (Jun 21)
- Re: Long AS Path Tom Beecher (Jun 21)
- Re: Long AS Path Steve Lalonde (Jun 22)
- Re: Long AS Path James Bensley (Jun 23)
- Re: Long AS Path Mel Beckman (Jun 23)
- Re: Long AS Path James Bensley (Jun 24)
- Re: Long AS Path Mel Beckman (Jun 24)
- Re: Long AS Path James Bensley (Jun 25)
- Re: Long AS Path Hunter Fuller (Jun 26)
- RE: Long AS Path Michael Hare (Jun 26)
- Re: Long AS Path Mel Beckman (Jun 26)
- RE: Long AS Path Jerry Cloe (Jun 26)