The MPLS WG Archive

[David Charlap <david.charlap@marconi.com>]

Don Fedyk wrote:
> David Charlap wrote:
>>
>> It is also, however, reasonable for a switch to just record the
>> contents of a Path message and do all admission control processing
>> when the Resv message is processed.
> 
> Reasonable ? What happens when you have to unwind the path
> because the Resv fails ?  Seems like a lot of work that
> could easily have been avoided.
> 
> It may be what the spec says, but it is not optimal.

As opposed to reserving resources before you know whether the path
signalled will even reach its destination?

There are justifiable reasons for both models.  The decision of which
one to choose is as much religious as it is technical.

-- David