[c-nsp] Accelerate Failure Detection of EoMPLS

[alaerte.vidali at nsn.com]

 Do you know if there is ways to accelerate detection of failure between
PEs and shutdown extended Vlan (through EoMPLS or VPLS).

PC1------PE1---------PE2------PC2
         |___________|

When simulating failure on link PE1---PE2, it is taking to long for
traffic switchover.
(already tested EoMPLS over TE with FRR, but it seems some issue with
extended Vlan)

By the way, there is layer 3 configured on Vlan with xconnect command. I
am wondering if this is making IOS go crazy.

Tks,
Alaerte