BigIron RX Series Configuration Guide 29553-1001986-01Configuring virtual routing interfaces 11Enter 1 to the maximum number of virtual routing interfaces supported on the device for.Bridging and routing the same protocol simultaneouslyon the same deviceSome configurations may require simultaneous switching and routing of the same single protocolacross different sets of ports on the same router. When IP routing is enabled on a device, you canroute IP packets on specific interfaces while bridging them on other interfaces. In this scenario, youcan create two separate backbones for the same protocol, one bridged and one routed.The following is a sample configuration for the illustration above.BigIron RX(config)# vlan 2BigIron RX(config-vlan-2)# tagged e 1/1 to 1/2BigIron RX(config-vlan-2)# router-inter ve 2BigIron RX(config-vlan-2)# ip-proto static e 1/1/ to 1/2BigIron RX(config-vlan-2)# exitBigIron RX(config)# vlan 3BigIron RX(config-vlan-3)# tagged e 1/13 to 1/24BigIron RX(config-vlan-3)# router-int ve 3BigIron RX(config-vlan-3)# exitBigIron RX(config)# interface ve 2BigIron RX(config-ve-2)# ip address 10.1.1.1/24BigIron RX(config-if-e1000-2/1)# exitBigIron RX(config)# interface ve 3BigIron RX(config-ve-3)# ip address 11.1.1.2/24IP packets are bridged (switched) within the same protocol VLAN if they are on the same subnet;they are routed if they are on a different VLAN.10.1.1.210.1.1.310.1.1.1 11.1.1.111.1.1.211.1.1.31/11/2ping 10.1.1.3will be switched1/131/24ping 11.1.1.3will be routedVLAN 2 VLAN 3
