nanog mailing list archives
Re: Prepending with another ASN you don't own
From: Rubens Kuhl <rubensk () gmail com>
Date: Fri, 16 Dec 2016 08:13:50 -0200
Even in that case I believe you should encapsulate between two instances of your own ASN. Your example follows this but the text says only about the last one in the path, while having both last and at least one previous is better since you won't be implying that some other AS has connection to yet another AS, it's just you doing this. Rubens On Thu, Dec 15, 2016 at 4:54 PM, Andrew Imeson <andrew () andrewimeson com> wrote:
Is it acceptable to prepend using another networks ASN as long as your ASN is the last one in the path? I can think of a few scenarios where this is helpful. One scenario: Anycast content provider with an ISP (who you aren't directly peering with) is choosing to send all traffic to a PoP on another continent. Solution: Prepend at the geographically-distant PoP so that the AS path looks like <ACME> <BAD-ISP> <ACME>, and thus that service provider (<BAD-ISP>) views it as a routing loop and chooses one of your other PoPs. Sure there are better solutions like communities, but why (if it is) would this be "bad?" -- Andrew Imeson andrew () andrewimeson com
Current thread:
- Prepending with another ASN you don't own Andrew Imeson (Dec 16)
- Re: Prepending with another ASN you don't own Rubens Kuhl (Dec 16)
- Re: Prepending with another ASN you don't own Randy Bush (Dec 16)
- Re: Prepending with another ASN you don't own Jon Lewis (Dec 16)
- Re: Prepending with another ASN you don't own Randy Bush (Dec 16)
- Re: Prepending with another ASN you don't own Jon Lewis (Dec 16)
- Re: Prepending with another ASN you don't own Job Snijders (Dec 16)
- Re: Prepending with another ASN you don't own Roland Dobbins (Dec 16)