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 joined bridge port 1/1
SwitchA> (enable) set vtp domain Corporate
VTP domain Corporate modified
SwitchA> (enable) set vtp mode server
VTP domain Corporate modified
SwitchA> (enable) set vlan 2 name Engineering
Vlan 2 configuration successful
SwitchA> (enable) set vlan 3 name Marketing
Vlan 3 configuration successful
SwitchA> (enable) set vlan 4 name Accounting
Vlan 4 configuration successful
SwitchA> (enable) set vlan 2 3/1
VLAN 2 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
2 3/1
SwitchA> (enable) set vlan 3 3/2
VLAN 3 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
3 3/2
SwitchA> (enable) set vlan 4 3/3
VLAN 4 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
4 3/3
SwitchA> (enable)
Switch B Configuration
This example shows how to configure Switch B:
SwitchB> (enable) set trunk 1/2 desirable
Port(s) 1/2 trunk mode set to desirable.
SwitchB> (enable) %DTP-5-TRUNKPORTON:Port 1/2 has become isl trunk
%PAGP-5-PORTTOSTP:Port 1/2 joined bridge port 1/2
%PAGP-5-PORTFROMSTP:Port 1/2 left bridge port 1/2
%PAGP-5-PORTTOSTP:Port 1/2 joined bridge port 1/2
SwitchB> (enable) set vtp domain Corporate
VTP domain Corporate modified
SwitchB> (enable) set vtp mode client
VTP domain Corporate modified
SwitchB> (enable) set vlan 2 3/1
VLAN 2 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
2 3/1
SwitchB> (enable) set vlan 3 3/2
Vlan 3 configuration successful
VLAN 3 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
3 3/2
SwitchB> (enable) set vlan 4 3/3
Vlan 4 configuration successful
VLAN 4 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
4 3/3
SwitchB> (enable)
Switch C Configuration
This example shows how to configure Switch C:
SwitchB> (enable) set vtp domain Corporate
VTP domain Corporate modified
SwitchB> (enable) set vtp mode client
VTP domain Corporate modified
SwitchB> (enable) set vlan 2 3/1
VLAN 2 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
2 3/1
SwitchB> (enable) set vlan 3 3/2
Vlan 3 configuration successful
VLAN 3 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
3 3/2
SwitchB> (enable) set vlan 4 3/3
Vlan 4 configuration successful
VLAN 4 modified.
VLAN 1 modified.
VLAN Mod/Ports
---- -----------------------
4 3/3
SwitchB> (enable)
RSM Configuration
This example shows how to configure the RSM:
SwitchA> (enable) session 5
Trying Router-5...
Connected to Router-5.
Escape character is '^]'.
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface vlan 2
Router(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to down
Router(config-if)#ip address 172.20.52.33 255.255.255.224
Router(config-if)#no shutdown
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to up
Router(config-if)#interface vlan 3
Router(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan3, changed state to down
Router(config-if)#ip address 172.20.52.65 255.255.255.224
Router(config-if)#no shutdown
Router(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan3, changed state to up
Router(config-if)#
%LINK-3-UPDOWN: Interface Vlan3, changed state to up
Router(config-if)#interface vlan 4
Router(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan4, changed state to down
Router(config-if)#ip address 172.20.52.97 255.255.255.224
Router(config-if)#no shutdown
Router(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan4, changed state to up
Router(config-if)#
%LINK-3-UPDOWN: Interface Vlan4, changed state to up
Router(config-if)#exit
Router(config)#^Z
Router#
%SYS-5-CONFIG_I: Configured from console by vty0 (127.0.0.2)
Router#copy running-config startup-config
Building configuration...
[OK]
Router#
