[c-nsp] ISIS Distance question

[JC Cockburn]

Hi Adam,
That’s what I was looking for...hmmm, might need to brush up on the lab
skills again, hehe...

Thanks
Ciao

-----Original Message-----
From: Vitkovský Adam [mailto:adam.vitkovsky at swan.sk] 
Sent: Tuesday, April 01, 2014 11:49 AM
To: JC Cockburn; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] ISIS Distance question

Hi JC,

> The real life problem is A and B are PE routers and C is the RR. So I 
> do not have MPLS on the interfaces towards C from A & B. So when the 
> A-B link fails, it will break the label switched path between them. A 
> and B have CsC links which should then be preferred..

If you are using separate Control-Plane (RRs that are not part of the
MPLS/data-plane) you may set the overload bit on your RRs via the "router
isis" cmd: "set-overload-bit". 
This will assign maximum ISIS metric to all links advertised by the RR -this
will assure that RR will never end up on the forwarding path between any two
PEs. 


adam