On må, feb 07, 2011 at 15:16:30, Peter Rathlev wrote: > Cc: [email protected] > Subject: Re: [c-nsp] TTL not decrementing (MPLS, SXI, Sup720) > > 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
You could disable it for forwarded packets and keep it for local packets for troubleshooting. Use no mpls ip propagate-ttl forwarded. This would let you do traceroutes from the devices but NMS stations etc would be affected which could be a disadvantage. /Daniel _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
