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Cell Relay Retreat>MPLS WG Archive>month:2002-Dec> msg00360



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suggested clarification to intro parts of draft-ietf-mpls-lsp -ping-01

  • From: Bora Akyol <bora@cisco.com>
  • Date: Wed, 18 Dec 2002 18:03:38 -0800
  • Cc: "David Allan" <dallan@nortelnetworks.com>, mpls@UU.NET

At 03:05 PM 12/18/2002 -0500, Curtis Villamizar wrote:
> > <DAVE> The outer LSP seems to use uniform mode as described, not pipe mode
> > in order to inherit the TTL of the inner LSP. If the outer LSP was pipe
> > mode, then it would start with a fixed value, not copied from the inner 
> LSP.
>
>The draft doesn't actually say that.
>
>Plus, the ingress can think its Uniform Mode and the egress can think
>its Pipe Mode.

I think if ingress thinks uniform and egress thinks pipe, the operator has 
a serious misconfiguration issue. In general pipe mode hides its 
intermediary hops from the first layer of the hierarchy.

Bora