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Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?'
From: Arnold Nipper via NANOG <nanog () nanog org>
Date: Wed, 9 Sep 2020 00:12:40 +0200
Douglas On 08.09.2020 17:55, Douglas Fischer via NANOG wrote:
Most of us have already used some BGP community policy to no-export some routes to some where. On the majority of IXPs, and most of the Transit Providers, the very common community tell to route-servers and routers "Please do no-export these routes to that ASN" is: -> 0:<TargetASN> So we could say that this is a de-facto standard. But the Policy equivalent to "Please, export these routes only to that ASN" is very varied on all the IXPs or Transit Providers. With that said, now comes some questions: 1 - Beyond being a de-facto standard, there is any RFC, Public Policy, or something like that, that would define 0:<TargetASN> as "no-export-to" standard? 2 - What about reserving some 16-bits ASN to use <ExpOnlyTo>:<TargetASN> as "export-only-to" standard? 2.1 - Is important to be 16 bits, because with (RT) extended communities, any ASN on the planet could be the target of that policy. 2.2 - Would be interesting some mnemonic number like 1000 / 10000 or so.
you may want to have a look at https://www.euro-ix.net/en/forixps/large-bgp-communities/ Cheers Arnold -- Keep calm, keep distance, keep connected! Arnold Nipper email: arnold () nipper de mobile: +49 172 2650958
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- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?', (continued)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Mark Tinka via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Robert Raszuk via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Mark Tinka via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Douglas Fischer via NANOG (Sep 08)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Mark Tinka via NANOG (Sep 08)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Robert Raszuk via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Mark Tinka via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Mark Tinka via NANOG (Sep 08)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Mike Hammett via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Jeff Tantsura via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Robert Raszuk via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Jeff Tantsura via NANOG (Sep 09)
- RE: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' adam via NANOG (Sep 09)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Jeff Tantsura via NANOG (Sep 09)
- RE: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' adamv0025 (Sep 11)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Tom Beecher (Sep 11)
- Re: BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?' Mark Tinka via NANOG (Sep 09)