Re: [Idr] Squatters (Was: BGP Attribute for Large communities (Attribute 30) was squatted on..)

"Jakob Heitz (jheitz)" <jheitz@cisco.com> Fri, 28 October 2016 16:41 UTC

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Thomas Mangin <thomas.mangin@exa.net.uk>, "swmike@swm.pp.se" <swmike@swm.pp.se>
Thread-Topic: [Idr] Squatters (Was: BGP Attribute for Large communities (Attribute 30) was squatted on..)
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Date: Fri, 28 Oct 2016 16:41:46 +0000
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References: <CAL9jLaZcCwBhUEs7cvsx3HfiPSRPXrcvOguCeuV2opSns9OZMw@mail.gmail.com> <677CE346-EFED-42B6-8A9F-75ABD2B4D6B4@cisco.com> <EBCE3CE8-1295-4CB2-9A1A-8BA2E154033D@gmail.com> <6e6a37a2a51eab848e9d498a1437365f@www.lamehost.it> <524D6F67-AAFA-4880-B977-8262333DFF5B@steffann.nl> <20161027095404.GP37101@Vurt.local> <CAH1iCipJNye8fpvFwBwoLkL3+=rWVcZac2BUFVcJXQ_9YTrXvg@mail.gmail.com> <BB1CCBAD-F278-4309-8520-06CC9FD825BD@exa.net.uk> <20161028110851.GA966@Vurt.local> <m237jgk97g.wl-randy@psg.com> <20161028122402.GB966@Vurt.local> <0F5E21B8-81A4-49E4-9B33-8320DB92ECFD@exa-networks.co.uk> <alpine.DEB.2.02.1610281504250.12036@uplift.swm.pp.se> <F244358D-E932-4AC7-83E4-DB26EE1E8B83@exa.net.uk>
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Cc: heasley <heas@shrubbery.net>, IETF IDR <idr@ietf.org>, Susan Hares <shares@ndzh.com>
Subject: Re: [Idr] Squatters (Was: BGP Attribute for Large communities (Attribute 30) was squatted on..)
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If they are optional transitive, then they should be treated like any other optional transitive attributes.

Many BGP implementations have a way to configure attribute filtering.
In IOS-XR, you configure an "attribute-filter group" and then apply it in "update in filtering".

Thanks,
Jakob.


> -----Original Message-----
> From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Thomas Mangin
> Sent: Friday, October 28, 2016 8:36 AM
> To: swmike@swm.pp.se
> Cc: heasley <heas@shrubbery.net>;; IETF IDR <idr@ietf.org>;; Susan Hares <shares@ndzh.com>;
> Subject: Re: [Idr] Squatters (Was: BGP Attribute for Large communities (Attribute 30) was squatted on..)
> 
> 
> > On 28 Oct 2016, at 14:05, Mikael Abrahamsson <swmike@swm.pp.se>; wrote:
> >
> > On Fri, 28 Oct 2016, Thomas Mangin wrote:
> >
> >> So... Should it recommend treat as withdraw if seen in the wild wild DFZ ?
> >
> > What's the benefit of that? Why make these codepoints unusable forever?
> 
> Yes, make sure that they are not uselessly carried on the DFZ.
> I can see the argument for ‘doing nothing’ tho.
> 
> Thomas
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