just a small addition: what Harold said is true for frame-mode MPLS. In cell-mode MPLS (MPLS enabled ATM switches and routers) there can be two LDP sessions or more. The design decision afaik was to have one LDP session per label space.
In frame-mode MPLS there is only one label space :0 hence only one LDP session.
In cell-mode MPLS there is one label space per ATM interface - label space :1,2,3,... labels used: VPI/VCI values - hence there can be many LDP sessions (one per interface).
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...