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Re: [mpls-tp] [PWE3] Proposal of using GAL for PW

"BUSI, ITALO (ITALO)" <italo.busi@alcatel-lucent.com> Mon, 05 July 2010 08:17 UTC

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From: "BUSI, ITALO (ITALO)" <italo.busi@alcatel-lucent.com>
To: "stbryant@cisco.com" <stbryant@cisco.com>, Shahram Davari <davari@broadcom.com>
Date: Mon, 5 Jul 2010 10:17:18 +0200
Thread-Topic: [mpls-tp] [PWE3] Proposal of using GAL for PW
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Cc: "lihan@chinamobile.com" <lihan@chinamobile.com>, Andy Malis <amalis@gmail.com>, "pwe3@ietf.org" <pwe3@ietf.org>, "mpls-tp@ietf.org" <mpls-tp@ietf.org>
Subject: Re: [mpls-tp] [PWE3] Proposal of using GAL for PW
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I agree with Stewart.

The GAL MUST be at the BoS in MPLS-TP where ECMP is not applicable and entroy labels MUST NOT be used.

In other MPLS environments (e.g., where entropy labels are used), RFC 5886 does not place any restriction on the position of the GAL within the label stack.

Italo

________________________________
From: mpls-tp-bounces@ietf.org [mailto:mpls-tp-bounces@ietf.org] On Behalf Of Stewart Bryant
Sent: venerdì 2 luglio 2010 11.24
To: Shahram Davari
Cc: Andy Malis; mpls-tp@ietf.org; lihan@chinamobile.com; pwe3@ietf.org; HUANG, Feng F (Feng)
Subject: Re: [mpls-tp] [PWE3] Proposal of using GAL for PW

On 01/07/2010 19:35, Shahram Davari wrote:
!mmm so if one used entropy then they can't have OAM?
-SD

Not so. The GAL goes above the entropy label (S=0), so gets parsed first. This works for both PHP and not PHP, and both LSP and PW.

- Stewart

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