Re: [Idr] Vendor Defaults (was Re: Review of draft-ietf-large-community-06.txt)

"Dickinson, Ian" <Ian.Dickinson@sky.uk> Mon, 07 November 2016 12:30 UTC

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From: "Dickinson, Ian" <Ian.Dickinson@sky.uk>
To: Robert Raszuk <robert@raszuk.net>, Gert Doering <gert@space.net>
Thread-Topic: [Idr] Vendor Defaults (was Re: Review of draft-ietf-large-community-06.txt)
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Date: Mon, 7 Nov 2016 12:30:25 +0000
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Cc: heasley <heas@shrubbery.net>, idr wg <idr@ietf.org>
Subject: Re: [Idr] Vendor Defaults (was Re: Review of draft-ietf-large-community-06.txt)
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Hi Robert,

>My example was very clear and I provided example of AS_PATH prepend.
>The point which you are missing is that if you execute community you should clean up and delete it.
>Blind default on or off is not the way to stop propagation of selected communities.
>And if someone is inserting 5539:* it seems obvious that the intention is that such community should get to 5539.

I would suggest that "clean up and delete" is not representative of all current usage that I know of.
The community is often left in place to show why a change in behaviour was triggered e.g. raising local preference.
This aids troubleshooting within IBGP and for downstream ASNs.

Ian

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