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Cell Relay Retreat>MPLS-OPS Archive>month:2001-Aug> msg00235



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Re: How to know a LSR is a penultimate hop LSR for a FEC?

  • From: Robert Raszuk <raszuk@cisco.com>
  • Date: Tue, 28 Aug 2001 04:04:11 -0700
  • CC: mpls-ops@mplsrc.com
  • Organization: Signature: http://www.employees.org/~raszuk/sig/
  • Resent-Date: Tue, 28 Aug 2001 08:40:43 -0400
  • To: "He, Yu Jun (Yujun)" <yujunhe@lucent.com>

He,

> It is suggested that MPLS should adopt penultimate hop popping, but in LDP
> session, no message carries the information that who is the penultimate LSR,
> how can a LSR know this information?

Incorrect. Label = 3 indicates that for this FEC the recepient should do
PHP.

R.

> "He, Yu Jun (Yujun)" wrote:
> 
> Hi:
> It is suggested that MPLS should adopt penultimate hop popping, but in LDP
> session, no message carries the information that who is the penultimate LSR,
> how can a LSR know this information?
> Best regards.
> Yujun
> 
> 
> 
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