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Cell Relay Retreat>MPLS WG Archive>month:2001-Jul> msg00143



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[Fwd: I-D ACTION:draft-pan-lsp-ping-00.txt]

  • From: Yakov Rekhter <yakov@juniper.net>
  • Date: Wed, 11 Jul 2001 11:00:06 -0700
  • cc: raszuk@cisco.com, Ron Bonica <rbonica@MCI.NET>, Dave Cooper <dcooper@gblx.net>, mpls-list <mpls@UU.NET>, mpls-ops <mpls-ops@mplsrc.com>

Eric,

> Eric> I guess  I'm also having  some trouble understanding why  the LSP-ping
> Eric> mechanism needs to be specific  to a particular control protocol.  Why
> Eric> not just  use a  UDP packet to  send the  response back to  the tunnel
> Eric> head?  It  won't necessarily travel  back along the control  path, but
> Eric> does that really matter?
> 
> Robert> It may disappear the same way  as the original icmp test so the head
> Robert> will assume that LSP is down while it is in fact up.
> 
> We just need  to invent a way to  ensure that the UDP packet  follows the IP
> hop-by-hop  path,  rather  than  being  sent through  an  LSP.   

or just use what is described in draft-pan-lsp-ping-00.txt.

Yakov.