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. O
n 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 domai
n 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#