LDP Configuration on Nokia Routers

LDP-configuratio

LDP Configuration on Nokia Routers

To do an LDP Configuration Example , we will use the below basic topology. Here, we will configure these two routers to become an LDP peer and establish an LSP session.

LDP configuration example topology, Nokia Service Routers, SR 7750

LDP Configuration Example Topology

Configuration on Router A

A:RouterA>config>router #
			interface “to_RouterB”
				address 10.0.0.1/24
				port 1/1/1
				exit
			interface “system”
				address 1.1.1.1/32
				exit
			exit
A:RouterA>config>router>ldp#
			interface-parameters
				interface “to_RouterB”
				exit
			exit

Configuration on Router B

B:RouterB>config>router #
			interface “to_RouterA”
				address 10.0.0.2/24
				port 1/1/2
				exit
			interface “system”
				address 2.2.2.2/32
				exit
			exit
B:RouterB>config>router>ldp#
			interface-parameters
				interface “to_RouterA”
				exit
			exit

Here, I would like to inform you about an important point. LDP sessions established between “transport addresses” of the routers. In Nokia Service Routers, this transport addresses are “system addresses”. The session is established between these system addresses. So, before LDP neighbour discovery, system addresses must be configured.

For more information about LDP, T-LDP and CR-LDP, check the related following RFCs…

RFC 5036: LDP Specification
RFC 3815: Definitions of Managed Objects for the MPLS,LDP
RFC 3478: Graceful Restart Mechanism for Label Distribution Protocol
RFC 5443: LDP IGP Synchronization
RFC 7307: LDP Extensions for Multi-Topology
RFC 7361: LDP Extensions for Optimized MAC Address Withdrawal in a H-VPLS
RFC 3212: Constraint-Based LSP Setup using LDP
RFC 3213: Applicability Statement for CR-LDP
RFC 3214: LSP Modification Using CR-LDP

One Response to “LDP Configuration on Nokia Routers”


  • Jama Yassin / Reply

    Hi Gokhan, can LDP alone work without enabling MPLS in ALU service router?.

    I saw router working fine in LDP, but after I issue show router mpls lsp, it show’s this error (MINOR: CLI MPLS is not configured.).

    but show router ldp binding is showing normal operational behavior.

    Regards.

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