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Re: [Idr] I-D Action: draft-ietf-idr-large-community-01.txt

Gert Doering <gert@space.net> Wed, 12 October 2016 09:05 UTC

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Date: Wed, 12 Oct 2016 11:05:50 +0200
From: Gert Doering <gert@space.net>
To: Brian Dickson <brian.peter.dickson@gmail.com>
Message-ID: <20161012090550.GW79185@Space.Net>
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-large-community-01.txt
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Hi,

On Tue, Oct 11, 2016 at 03:02:57PM -0700, Brian Dickson wrote:
> What I believe Tom was trying to articulate is this:
> 
> If some sends Large communities which start with HIS_ASN, he needs this MUST to use as a clue-by-four in communicating with the offending party.

But that is easily solved today by a) commercial arrangements, and b) filters.

If someone tags a community with 5539:xxx today, which might or might not
have any meaning inside my AS, 5539, I will only accept this community from
BGP peers that have a corresponding commercial relationship (typically,
customers, that are allowed to influence "announce-here", "prepend-there",
etc.).

>From anyone else, I will not accept 5539:x communities.

Should I care if anyone else out there (40000+ networks) is using 5539:xx
for something else?  Should I act?  Why?

> Squatting on assigned number resources is a horrible thing to deal with. I personally have had an IPv4 prefix squatted on, and that was something where things were significantly impacted.

IPv4 prefixes have global significance.  Communities have not.

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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