The MPLS WG Archive

[Bora Akyol <akyol@pluris.com>]

The tunnels are established using IGP reachability information. When the
tunnel goes away, IGP route will become the next best route and traffic
will be traveling via IP.

This may take a while, but until the head end realizes that the tunnel is
down, there really is not much you can do. The packets will fall on the
ground.

I believe G-MPLS defines a failure notification mechanism.

Bora


On Fri, 20 Apr 2001, Dekany, Steven wrote:

> Greetings;
> 
> I am looking for help, with the following:
> 
> Assume I have an MPLS Service Provider network, running RSVP-TE as a
> signaling protocol. Customer sites are connected to my network via various
> IP only links - no MPLS.   Upon a LSP link failure in my core - assume that
> I have exhausted all back-up, re-route etc., options and my LSP tunnel is
> still down - what happens to my incoming IP traffic at the ingress LER? Is
> there an ICMP message generated back to IP Source with "Destination
> Unreachable? , or an SNMP Trap, or both? Or something else? 
> 
> (Or is this a dumb question, because I have not read the relevant draft...)
> 
> Any help or pointers would be greatly appreciated.
> 
> Thanks in advance,
> 
> 
> Steven 
>