The problem could be that one of the interfaces in between doesnt have mpls ip enabled on its interface.
Also, if an LSP Ping is unsuccessful and times out (resulting "....."), the failure might occur on the return path. In this case, retry the router-alert reply mode. This mode instructs all intermediate routers in the return path to process the packet. This option is most useful for isolating MPLS switching path problems.
If you do not get a reply to a ping mpls pseudowire using the default IPv4 reply mode, but you do get a successful reply using the RA reply mode, you can infer that a switching path problem exists in the return path, most likely a CEF inconsistency between the linecard and the RP card in an intermediate node. You can reach this conclusion because with RA reply mode, all MPLS Echo Reply packets are punted to the RP to be processed switched.
Introduction: The "external-out enable" command is available for
configuration under the "router ospf process" in case of the IOS-XR
operating system. This command basically enables advertisement of
intra-area routes on the device as external routes in th...
IntroductionIn this article we'll discuss how to troubleshoot packet
loss in the asr9000 and specifically understanding the NP drop counters,
what they mean and what you can do to mitigate them. This document will
be an ongoing effort to improve troublesh...