[j-nsp] RSVP aggressive preemption and soft preemption

Kris Price juniper-nsp at punk.co.nz
Fri Mar 14 13:19:55 EDT 2014


Hi list,

I'm out of date and looking to get an feel for the current practice 
regarding RSVP aggressive preemption in a network with a lot of 
aggregated links (LAGs).

Is this still the thing to do?

Does this work safely, or even work as expected, in conjunction with 
'soft preemption'? And is that something people use?

That is if aggressive preemption with soft preemption is enable, once a 
LAG member (or members) are dropped, the preempted LSPs will be given a 
PathErr with a Reroute and a chance to establish a new path in a 
make-before-break fashion. At the cost that your LAG may be congested 
until this is complete.

Thanks for all help.

Cheers :)
Kris


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