Re: [Idr] [GROW] Question about BGP Large Communities
"Dongjie (Jimmy)" <jie.dong@huawei.com> Wed, 05 February 2020 01:40 UTC
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From: "Dongjie (Jimmy)" <jie.dong@huawei.com>
To: Robert Raszuk <robert@raszuk.net>, "Jakob Heitz (jheitz)" <jheitz@cisco.com>
CC: "Sriram, Kotikalapudi (Fed)" <kotikalapudi.sriram@nist.gov>, Job Snijders <job@ntt.net>, Nick Hilliard <nick@foobar.org>, John Heasly <heas@shrubbery.net>, "idr@ietf.org" <idr@ietf.org>, "grow-chairs@ietf.org" <grow-chairs@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "grow@ietf.org" <grow@ietf.org>
Thread-Topic: [GROW] Question about BGP Large Communities
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Date: Wed, 05 Feb 2020 01:40:22 +0000
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Subject: Re: [Idr] [GROW] Question about BGP Large Communities
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Agree that for this case it may be more convenient to just use extended community with a new type, this could avoid any possible collision with existing deployments, and save the effort of assigning a set of ASNs. Wide community may be too powerful for this:) Best regards, Jie From: Robert Raszuk [mailto:robert@raszuk.net] Sent: Wednesday, February 5, 2020 6:38 AM To: Jakob Heitz (jheitz) <jheitz@cisco.com> Cc: Sriram, Kotikalapudi (Fed) <kotikalapudi.sriram@nist.gov>; Job Snijders <job@ntt.net>; Nick Hilliard <nick@foobar.org>; John Heasly <heas@shrubbery.net>; idr@ietf.org; grow-chairs@ietf.org; idr-chairs@ietf.org; grow@ietf.org Subject: Re: [GROW] Question about BGP Large Communities > How would you divide the numbers? I would not divide them at all in LCs. I would either define new type in extended communities or use wide communities. But I am a bit biased here ;-) Best, R, On Tue, Feb 4, 2020 at 11:34 PM Jakob Heitz (jheitz) <jheitz@cisco.com<mailto:jheitz@cisco.com>> wrote: The numbers are a trade off. How would you divide the numbers? Thanks, Jakob. On Feb 4, 2020, at 2:19 PM, Robert Raszuk <robert@raszuk.net<mailto:robert@raszuk.net>> wrote: And you think 255 such known large communities will be sufficient ? Thx, R. On Tue, Feb 4, 2020 at 9:45 PM Jakob Heitz (jheitz) <jheitz@cisco.com<mailto:jheitz@cisco.com>> wrote: A set of well known large communities could be useful. I have a draft that I never submitted attached to this email. Does anyone want to co-author and suggest changes? Regards, Jakob. From: Sriram, Kotikalapudi (Fed) <kotikalapudi.sriram@nist.gov<mailto:kotikalapudi.sriram@nist.gov>> Sent: Tuesday, February 4, 2020 10:22 AM To: Jakob Heitz (jheitz) <jheitz@cisco.com<mailto:jheitz@cisco.com>>; Job Snijders <job@ntt.net<mailto:job@ntt.net>>; Nick Hilliard <nick@foobar.org<mailto:nick@foobar.org>>; John Heasly <heas@shrubbery.net<mailto:heas@shrubbery.net>> Cc: idr@ietf.org<mailto:idr@ietf.org>; grow@ietf.org<mailto:grow@ietf.org>; idr-chairs@ietf.org<mailto:idr-chairs@ietf.org>; grow-chairs@ietf.org<mailto:grow-chairs@ietf.org>; a.e.azimov@gmail.com<mailto:a.e.azimov@gmail.com>; Brian Dickson <brian.peter.dickson@gmail.com<mailto:brian.peter.dickson@gmail.com>> Subject: Question about BGP Large Communities In the route leaks solution draft, https://tools.ietf.org/html/draft-ietf-grow-route-leak-detection-mitigation-02 we (the authors) have proposed using BGP Large Community. We specify this to be a "well-known transitive Large Community". Question: Can the draft simply make an IANA request for a Global Administrator ASN value for Route Leaks Protection (RLP) type and request that it be published in IANA registry as a "well-known Transitive Large Community"? There is no IANA registry for Large Communities yet; we have requested IDR and GROW Chairs to facilitate that. ---------------- Details/background: We've read the following RFCs related to Large Communities: https://tools.ietf.org/html/rfc8092 https://tools.ietf.org/html/rfc8195 RFC 8195 has this table: +-------------------------------+-------------------------+ | RFC8092 | RFC 8195 | +-------------------------------+--------------------------+ | Global Administrator | ASN | | Local Data Part 1 | Function | | Local Data Part 2 | Parameter | +--------------------------------+-------------------------+ which is instructive. In the examples that RFC 8195 offers, it appears it is *assumed* that the Large Communities are transitive. For comparison, in Extended Communities (RFC 7153), there are explicit Type values assigned for Transitive, Non-transitive, etc. https://www.iana.org/assignments/bgp-extended-communities/bgp-extended-communities.xhtml However, there is no such explicit Type specification for Large Communities (in RFC 8092 or elsewhere). Thank you. Sriram _______________________________________________ GROW mailing list GROW@ietf.org<mailto:GROW@ietf.org> https://www.ietf.org/mailman/listinfo/grow
- [Idr] Question about BGP Large Communities Sriram, Kotikalapudi (Fed)
- Re: [Idr] [GROW] Question about BGP Large Communi… Alvaro Retana
- Re: [Idr] [GROW] Question about BGP Large Communi… Robert Raszuk
- Re: [Idr] [GROW] Question about BGP Large Communi… Robert Raszuk
- Re: [Idr] [GROW] Question about BGP Large Communi… Jakob Heitz (jheitz)
- Re: [Idr] [GROW] Question about BGP Large Communi… Robert Raszuk
- Re: [Idr] Question about BGP Large Communities Jakob Heitz (jheitz)
- Re: [Idr] Question about BGP Large Communities John Heasly
- Re: [Idr] Question about BGP Large Communities Brian Dickson
- Re: [Idr] Question about BGP Large Communities Sriram, Kotikalapudi (Fed)
- Re: [Idr] Question about BGP Large Communities Brian Dickson
- Re: [Idr] Question about BGP Large Communities Jakob Heitz (jheitz)
- Re: [Idr] [GROW] Question about BGP Large Communi… Brian Dickson
- Re: [Idr] [GROW] Question about BGP Large Communi… Dongjie (Jimmy)
- Re: [Idr] Question about BGP Large Communities Jakob Heitz (jheitz)
- Re: [Idr] [GROW] Question about BGP Large Communi… Zhuangshunwan
- Re: [Idr] [GROW] Question about BGP Large Communi… Robert Raszuk
- Re: [Idr] [GROW] Question about BGP Large Communi… Nick Hilliard
- Re: [Idr] Question about BGP Large Communities Randy Bush
- Re: [Idr] [GROW] Question about BGP Large Communi… Randy Bush
- Re: [Idr] Question about BGP Large Communities Dongjie (Jimmy)
- Re: [Idr] Question about BGP Large Communities Sriram, Kotikalapudi (Fed)