Re: [Idr] XXCs

"UTTARO, JAMES" <ju1738@att.com> Wed, 08 April 2020 14:53 UTC

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From: "UTTARO, JAMES" <ju1738@att.com>
To: Robert Raszuk <robert@raszuk.net>, "Jakob Heitz (jheitz)" <jheitz@cisco.com>
CC: "idr@ietf. org" <idr@ietf.org>, BESS <bess@ietf.org>
Thread-Topic: [Idr] XXCs
Thread-Index: AQHWDbPmin7NOrnJA0mevIT3SnuJCahvTTiA
Date: Wed, 8 Apr 2020 14:53:08 +0000
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Subject: Re: [Idr] XXCs
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Not sure if the intention here intersects with what I had in mind in 2012.. Pradosh, Saikat and I created a draft that introduced the notion of OAD ( One Administrative Domain ). The challenge from my point of view was and still is how to treat non-transitive attributes as transitive across the set of AS domains that “belong” to the same administrative domain. An example of this is the application of Local-Pref across a set of disparate As domains that a customers VPN spans.

We are tackling a similar problem when spanning AS domains that are reflective of differing services.. i.e  a customer VPN spans EVPN and 2547 signaling domains.

https://tools.ietf.org/html/draft-uttaro-idr-oad-01

https://tools.ietf.org/html/draft-ietf-bess-evpn-ipvpn-interworking-02

Thanks,
              Jim Uttaro

From: Idr <idr-bounces@ietf.org> On Behalf Of Robert Raszuk
Sent: Wednesday, April 08, 2020 10:41 AM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>
Cc: idr@ietf. org <idr@ietf.org>
Subject: [Idr] XXCs

Hey Jakob,

So just an idea - if we are to redefine transitivity for XXC why don't we forget about all of this ASN reservations and simply instead of two transitive bits define three.

Make 3rd bit to mean transitive only under set of ASes under same administrative control ?

You still need a knob to know which ASNs are to be treated as same administration. And with that no change to community syntax  is needed at all - LOCAL_ASN:NUMBER

Done !

Thx,
R.