According to RFC 3031 Egress-Targeted Labels can be assigned if the ingress router (Ri) knows "for sure" that a set of FEC follow the same LSP across the MPLS P-net.
One of the ways for Ri to know this is:
"If the network is running a link state routing algorithm, and all nodes in the area support MPLS, then the routing algorithm provides Ri with enough information to determine the routers through which packets in that FEC must leave the routing domain or area."
I do not agree with this statement for interdomain routing in ISIS or InterArea in OSPF... but maybe I am missing something or misunderstanding the idea behind all this.
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...