Re: [lisp] Questions about draft-saucez-lisp-itr-graceful-03

[Dino Farinacci <[e-mail]>]

> Well it is not just theoretical, it can happen as soon as you have two
> egress points, even in active/active mode.
> 
> Imagine you have two identical egress points in your network (let say
> that they can both reach the whole Internet) depending on the IGP the
> traffic from a part of the network will go to one and the traffic from
> the other part of the network will go to the second router.
> Unfortunately the set of destination is not the same in both part of
> the network so when you fallback to one router after the outage of the
> other one, you will have misses.
> 
> We have evaluated that on our network (that is primary/backup) and
> simulated it as active/active and noticed that the storm would not
> negligible.

Yes, understand Damien. One has to decide how much machinery one puts in a protocol for events that don't happen often.

Dino