4000 Router Series MPLS Configuration Guide

[RouterC-isis-1] network-entity 00.0005.0000.0000.0003.00

[RouterC-isis-1] quit

[RouterC] interface ethernet 1/1

[RouterC-Ethernet1/1] isis enable 1

[RouterC-Ethernet1/1] quit

[RouterC] interface loopback 0

[RouterC-LoopBack0] isis enable 1

[RouterC-LoopBack0] quit

After the previous configuration, execute the display ip routing-table command on each router.

You can see that the routers have learned the routes to one another, including the routes to the

Loopback interfaces.

3. Configure an LSR ID, and enable MPLS and MPLS TE:

# Configure Router A.

[RouterA] mpls lsr-id 1.1.1.1

[RouterA] mpls te

[RouterA-te] quit

[RouterA] interface ethernet 1/1

[RouterA-Ethernet1/1] mpls enable

[RouterA-Ethernet1/1] mpls te enable

[RouterA-Ethernet1/1] quit

# Configure Router B.

[RouterB] mpls lsr-id 2.2.2.2

[RouterB] mpls te

[RouterB-te] quit

[RouterB] interface ethernet 1/1

[RouterB-Ethernet1/1] mpls enable

[RouterB-Ethernet1/1] mpls te enable

[RouterB-Ethernet1/1] quit

[RouterB] interface ethernet 1/2

[RouterB-Ethernet1/2] mpls enable

[RouterB-Ethernet1/2] mpls te enable

[RouterB-Ethernet1/2] quit

# Configure Router C.

[RouterC] mpls lsr-id 3.3.3.3

[RouterC] mpls te

[RouterC-mpls] quit

[RouterC] interface ethernet 1/1

[RouterC-Ethernet1/1] mpls enable

[RouterC-Ethernet1/1] mpls te enable

[RouterC-Ethernet1/1] quit

4. Configure an MPLS TE tunnel:

# On Router A, configure the MPLS TE tunnel interface Tunnel 0, specify the tunnel destination

address as the LSR ID of Router C, and configure MPLS TE to use a static CRLSP to establish the

tunnel.

[RouterA] interface tunnel 0 mode mpls-te

[RouterA-Tunnel0] ip address 6.1.1.1 255.255.255.0

[RouterA-Tunnel0] destination 3.3.3.3