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Community Member

mpls ip-ttl-propagate disable forwarded in IOS XR

Hi,

I have a network with MPLS VPN L3, i am using Cisco CRS like P and ASR9000 for PE. I try to hide my links between PE - P and P - P, so i configured in my network mpls ip-ttl-propagate disable forwarded. The problem that i have now, is when i make a traceroute from a CE to another CE, the Egress PE does not respond the icmp unreachable with a source IP in the VRF, instead of this the source IP is the IP that i have assigned to the pe in the link between P and PE.

#traceroute 192.0.2.6

  1 192.0.2.1 4 msec 0 msec 0 msec
  2 10.0.0.10 4 msec 0 msec 4 msec
  3 192.0.2.6 4 msec 0 msec 0 msec

If i try the same configuration in a testing network with IOS instead of IOS XR, the egress PE respond with an IP asiggned to a VRF interface like i hope.

#traceroute 192.0.2.6

  1 192.0.2.1 4 msec 0 msec 0 msec
  2 192.0.2.5 4 msec 0 msec 4 msec
  3 192.0.2.6 4 msec 0 msec 0 msec

I attached the topology that i am using

I will appreciate if someone could help me.

Regards
                        José

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

What version are you runing?.

What version are you runing?.

 

Can you try "icmp ipv4 source vrf" and try the trace again?.

 

-Nagendra

2 REPLIES
Cisco Employee

What version are you runing?.

What version are you runing?.

 

Can you try "icmp ipv4 source vrf" and try the trace again?.

 

-Nagendra

Community Member

Thanks Nagendra, this command

Thanks Nagendra, this command resolve my problem ... The trace looks fine now.

I am using IOS XR 4.3.4

Regards
                     José

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