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Cell Relay Retreat>MPLS WG Archive>month:2002-Dec> msg00134



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Last Call on MPLS ping

  • From: Eric Rosen <erosen@cisco.com>
  • Date: Tue, 10 Dec 2002 17:26:47 -0500
  • cc: Alia Atlas <aatlas@avici.com>, mpls@UU.NET
  • User-Agent: EMH/1.14.1 SEMI/1.14.3 (Ushinoya) FLIM/1.14.3(Unebigoryōmae) APEL/10.3 Emacs/21.2(sparc-sun-solaris2.8) MULE/5.0 (SAKAKI)


Shahram> The LSP-ping text says: 

"  In either case, the MPLS echo request would
   have a label stack of <1001, 23456>.  (Note: in this example, 1001 is
   the "outer" label and 23456 is the "inner" label.)"


Okay, so  my interpretation was  overly charitable ;-) Perhaps  I overlooked
that passage because it is obvious that  it can't work that way, as Alia has
pointed out in more detail.  Generally one can't put the PW label or the VPN
route label on the LSP ping, because the LSP egress for those labels will be
a CE device.  But  I don't think that's a real problem,  since we don't want
the pings to go to the CE device.