Samsung Ubigate iBG3026, Configuration Manual, Page: 189 / 718

Ubigate iBG3026 Configuration Guide/Ed.00
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MPLS Configuration Example
Label Distribution Protocol (LDP) Overview
LDP generates labels for and exchanges labels between peer routers. It works
in with other routing protocols(RIP, OSPF and BGP) to create the label-
switched paths(LSP) used when forwarding packets. A label-switched path is
the path taken by all the packets that belong to the Forwarding Equivalence
Class(FEC) corresponding to that LSP.
LDP assigns labels to every destination address and destination prefix
provided by Ubigate iBG3026. The LDP interface to the MPLS forwarder
adds labels to and deletes labels from the forwarding tables.
Running LDP on a system, requires the following tasks:
Enabling label-switching on the interface on NSM.
Enabling LDP on an interface in the LDP daemon.
Running an IGP(for example, OSPF) to distribute reachability information
within the MPLS cloud.
Configuring the transport address.
Figure 18.3 Configuring Label Distribution Protocol
lo
192.168.0.1/3 2
eth 1/2
192.168.0.2/3 2
192.168.0.3/3 2
eth 1/1 R1 R3
R2 eth 2/2
10.10.10.0/24 10.10.11.0/24
eth 2/3
lo
lo