ldp

LDP and RSVP-TE are both signaling protocols used for establishing LSP in the MPLS networks. The latter one provides traffic engineering capability and in this article, I will try to set basic MPLS-TE tunnels on IOS XR devices to show you a problem, you can run into. A label switched path (LSP) is a sequence of LSR that switch a labeled packet through an MPLS network. As long LSP is contiguous (end-to-end between PE routers) there should be no problem in forwarding packets....

The Label Distribution Protocol (LDP) allocates a local label for every route learned from the IGP. But the question is, do we really need a label for every route? The short answer is no! We can optimize LDP and save resources by allocating labels only to the Provider Edge (PE) routers. Let’s test in the lab on IOS and IOS XR devices. Diagram Every router has a Loopback0 configured with IP address X....