[c-nsp] Packet Loss During the Backbone Network Converge

[Oliver Boehmer (oboehmer)]

> Using the hello-interval 1, dead-interval 4.
> 
> 7600 using fast-hello, but asr9000 cannot support, that's why using the 1
> &4.

you should use BFD instead..

but about the issue: You stated that PE4 is not in the traffic path, but PE4 failure is still causing packet loss, then I guess you want to check if PE4 is really not in the path? How long does it take until traffic continues? Is it msecs or seconds? 
This requires close troubleshooting, "debug ip routing" on all routers would be a first start (with debug timestamps and sync'ed clocks).

	oli