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[mpls] LSP PING Ext for testing backup path

From: "M. ELK" <elkou141061@hotmail.com>
Date: Wed, 18 May 2005 10:04:17 +0000
X-OriginalArrivalTime: 18 May 2005 10:04:18.0133 (UTC)FILETIME=[F4424850:01C55B90]
X-Originating-Email: [elkou141061@hotmail.com]
X-Originating-IP: [57.250.229.136]


Hi

In LSP PING draft :

quote

The problem of probing the various flavors of backup paths that will typ-
ically not be used for forwarding data unless the primary LSP is down
will not be addressed here.

Unquote

Any other draft address/suggest a way/technique  to on-line test a FRR 
facility ??.
Or , did any manufacturer introduce a proprietary feature to do the same ??? 
.

My guess that by extending the DS mapping TLV the FRR facility could be 
tested ,
ex:
    X-------Y-------Z

  when Y respond with echo reply ,it send qty 2 DS TLV : one for the normal 
path and the
  other for the protected one .
  X could excercise the protected one in his next echo request (using 
multipath info ).

Brgds

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