Configuring Local Cross-Connects Between Ethernet/VLAN Interfaces

This section provides an example for configuring a local cross-connect that uses MPLS between two Ethernet/VLAN interfaces.

Note: You must use the mpls-relay command instead of the route interface command to configure a local cross-connect, regardless of the MPLS tunneling method used in the core network.

Figure 119 shows the interface stack that the router builds for this configuration.

Figure 119: Local Cross-Connect Between Ethernet/VLAN Interfaces

Image g013278.gif

To configure the application shown in Figure 119:

Configure a local IP address.

You can use any reachable local IP address. This example uses a loopback interface to provide the local IP address.


                  
                     host1(config)#interface loopback 0 
                     
                     host1(config-if)#ip address 10.1.1.1 255.255.255.255 
                     
                     host1(config-if)#exit

Configure the Ethernet/VLAN interface on one side of the local cross-connect.


                  
                     host1(config)#interface fastEthernet 9/1 
                     
                     host1(config-if)#encapsulation vlan 
                     
                     host1(config-if)#exit 
                     
                     host1(config)#interface fastEthernet 9/1.1 
                     
                     host1(config-if)#vlan id 10

(Optional) If you are configuring a multiservice local cross-connect, assign an IP address and mask to the Ethernet/VLAN interface.


                  
                     host1(config-if)#ip address 10.1.2.3 255.255.255.0

Configure MPLS tunneling on this side of the connection by issuing the mpls-relay command.

When you issue the mpls-relay command, you must use a reachable local IP address and the same VC ID value (4) on both sides of the connection.


                  
                     host1(config-if)#mpls-relay 10.1.1.1 4 
                     
                     host1(config-if)#exit

Configure the Ethernet/VLAN interface on the other side of the local cross-connect.


                  
                     host1(config)#interface fastEthernet 3/1 
                     
                     host1(config-if)#encapsulation vlan 
                     
                     host1(config-if)#exit 
                     
                     host1(config)#interface fastEthernet 3/1.1 
                     
                     host1(config-if)#vlan id 11

(Optional) If you are configuring a multiservice local cross-connect, assign an IP address and mask to the Ethernet/VLAN interface.


                  
                     host1(config-if)#ip address 10.1.2.4 255.255.255.0

Configure MPLS tunneling on this side of the connection by issuing the mpls-relay command.

You must use a reachable local IP address and the same VC ID value (4) specified in Step 4.


                  
                     host1(config-if)#mpls-relay 10.1.1.1 4 
                     
                     host1(config-if)#exit

Configuring Local Cross-Connects Between Ethernet/VLAN Interfaces

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