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Re: [mpls-tp] PSC MEP action on Non TTL 1 value- Receive

Apratim Mukherjee <AMukherjee@ixiacom.com> Tue, 15 March 2011 10:26 UTC

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From: Apratim Mukherjee <AMukherjee@ixiacom.com>
To: Saravanan P <PSaravanan@ixiacom.com>, "mpls-tp@ietf.org" <mpls-tp@ietf.org>
Date: Tue, 15 Mar 2011 03:28:16 -0700
Thread-Topic: PSC MEP action on Non TTL 1 value- Receive
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Subject: Re: [mpls-tp] PSC MEP action on Non TTL 1 value- Receive
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Hi

It is expected that the PW will have Control Word enabled. 

So data packets will have first 4 bits as 0000 and OAM packets due to GACh will have first 4 bits as 0001 , which provides the distinguishing factor. 

Regards,
Apratim

-----Original Message-----
From: mpls-tp-bounces@ietf.org [mailto:mpls-tp-bounces@ietf.org] On Behalf Of Saravanan P
Sent: Tuesday, March 15, 2011 3:36 PM
To: mpls-tp@ietf.org
Subject: [mpls-tp] PSC MEP action on Non TTL 1 value- Receive

Hi,

In spec  Linear Protection draft-ietf-mpls-tp-linear-protection-04.txt, what will be the default behavior if designated MEP receives the PSC OAM packet with  Pseudowire lable has non TTL 1 value ?

How does MEP in PE knows that should pass the packet to control plane or forward the packet since PW label is non TTL 1 value.

PE should take decision by seeing Tunnel and PW  label or TTL also need to be looked ?
Regards,
Saravanan.
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