[c-nsp] TTL not decrementing (MPLS, SXI, Sup720)

Peter Rathlev peter at rathlev.dk
Mon Feb 7 09:16:30 EST 2011


Hi Manu,

On Mon, 2011-02-07 at 15:09 +0100, Manu Chao wrote:
> If IP TTL propagation is disabled in your MPLS Core with the no mpls
> ip propagate-ttl command in global configuration mode, the TTL value
> is not copied in the IP header and on your end to end traceroute.

So you're saying it works as expected with "no mpls ip propagate-ttl"?
That would be interesting.

We currently use TTL propagation and we like it from a trouble shooting
perspective. But we're also getting tired of people not able to
interpret traceroutes, so we've thought about disabling it anyway.

We've actually had a request where the users wanted us to "create a more
direct route" because they saw "too many" hops in their traceroute. And
I bet they're not willing to pay for a new stretch of glass...

-- 
Peter




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