Configuring IP InterVLAN Routing&#32

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Step 1 (Optional) Enable IP routing on the router1.
　　ip routing
　　
　　Step 2 (Optional) Specify an IP routing protocol2.
　　router ip_routing_protocol
　　
　　Step 3 Specify a VLAN interface on the RSM.
　　interface vlan-id
　　
　　Step 4 Assign an IP address to the VLAN.
　　ip address n.n.n.n mask
　　
　　Step 5 Exit configuration mode.
　　Ctrl-Z
　　This example shows how to enable IP routing on the RSM, create a VLAN interface, and assign the interface an IP address:
　　
　　Router#configure terminal
　　
　　Enter configuration commands, one per line. End with CNTL/Z.
　　Router(config)#ip routing
　　
　　Router(config)#router rip
　　
　　Router(config-router)#network 10.0.0.0
　　
　　Router(config-router)#interface vlan 100
　　
　　Router(config-if)#ip address 10.1.1.1 255.0.0.0
　　
　　Router(config-if)#^Z
　　
　　Router#
　　
　　Configuring IP InterVLAN Routing on an External Ro
　　Step 1 (Optional) Enable IP routing on the router1.
　　ip routing
　　
　　Step 2 (Optional) Specify an IP routing protocol2.
　　router ip_routing_protocol
　　
　　Step 3 Create a subinterface on a physical interface.
　　interface interface_type interface_number.subinterface-_number
　　
　　Step 4 Specify the encapsulation and VLAN number to use on the subinterface.
　　encapsulation encapsulation_type vlan_id
　　
　　Step 5 Assign an IP address to the subinterface.
　　ip address n.n.n.n mask
　　
　　Step 6 Repeat Steps 3-5 for each VLAN between which you want to route traffic.
　　
　　
　　Step 7 Exit configuration mode.
　　Ctrl-Z
　　
　　This example shows how to enable IP routing on the router, create two subinterfaces, and specify the encapsulation, VLAN number, and IP address for each subinterface:
　　
　　Cisco7505#configure terminal
　　
　　Enter configuration commands, one per line. End with CNTL/Z.
　　Cisco7505(config)#ip routing
　　
　　Cisco7505(config)#router rip
　　
　　Cisco7505(config-router)#network 10.0.0.0
　　
　　Cisco7505(config-router)#interface fastethernet2/0.100
　　
　　Cisco7505(config-subif)#encapsulation isl 100
　　
　　Cisco7505(config-subif)#ip address 10.10.1.1 255.255.0.0
　　
　　Cisco7505(config-router)#interface fastethernet2/0.200
　　
　　Cisco7505(config-subif)#encapsulation isl 200
　　
　　Cisco7505(config-subif)#ip address 10.20.1.1 255.255.0.0
　　
　　Cisco7505(config-subif)#^Z
　　
　　Cisco7505#
　　
　　InterVLAN Routing Configuration Examples
　　[[The No.1 Picture.]]
　　配置步骤
　　1. Configure Switch A as a VTP server and assign a VTP domain name.
　　
　　2. Configure Switch B and Switch C as VTP clients and assign the same VTP domain name.
　　
　　3. Configure ISL trunk links between the switches.
　　
　　4. Create the VLANs on Switch A (the VLAN information is propagated to Switch B and Switch C through VTP).
　　
　　5. Assign the switch ports on each switch to the appropriate VLAN.
　　
　　6. On the RSM, create one VLAN interface for each VLAN configured on Switch A.
　　
　　7. Assign IP addresses to the VLAN interfaces.
　　
　　Switch A Configuration
　　This example shows how to configure Switch A:
　　
　　SwitchA> (enable) set trunk 1/1 desirable
　　
　　Port(s) 1/1 trunk mode set to desirable.
　　SwitchA> (enable) %DTP-5-TRUNKPORTON:Port 1/1 has become isl trunk
　　%PAGP-5-PORTTOSTP:Port 1/1 joined bridge port 1/1
　　%PAGP-5-PORTFROMSTP:Port 1/1 left bridge port 1/1
　　%PAGP-5-PORTTOSTP:Port 1/1<