The MPLS WG Archive

[Jean Philippe Vasseur <jvasseur@cisco.com>]

Hi Claus,

At 11:08 12/02/2002 -0600, claus.bauer@tellabs.com wrote:
>Hi
>I refer to the draft "Note also that the
> > backup tunnel path computation may be performed by a centralized path
> > computation server or may use some distributed backup path computation
> > algorithms."
>Does this imply the following:
>When the PLR receives the original path message with a fast reroute
>object he could either run CSPF on its own
>or contact the path computation server such that the path computation
>server runs CSPF and sends the ERO for the detour back to the PRL ?

What we mean here is that the bypass tunnel path computation may be done in 
different ways:
- static config on every PLR,
- dynamic backup path computation done by the PLR (CSPF is an option)
- backup path computation done by a Path Computation Server,
- ...
Of course the backup path computation complexity is directly correlated to 
the set of constraints that should be taken into account.

JP.

>Claus
>
>Dr. Claus Bauer
>Research engineer
>Tellabs Research Center
>One Kendall Square
>Bldg. 100, Suite 121
>Cambridge, MA, 02139
>USA
>
>Tel.: +1 617 577 8787
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>