Specifications

Configuring Routing Between VLANs
How to Configure Routing Between VLANS
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DETAILED STEPS
Configuring XNS Routing over ISL
XNS can be routed over VLAN subinterfaces using the ISL VLAN encapsulation protocol. The XNS
Routing over ISL Virtual LANs feature provides full-feature Cisco IOS software XNS support on a
per-VLAN basis, allowing standard XNS capabilities to be configured on VLANs.
To route XNS over ISL VLANs, you need to configure ISL encapsulation on the subinterface.
Perform the steps described in the following task in the order in which they appear.
SUMMARY STEPS
1. enable
2. configure terminal
3. xns routing [address]
4. interface type slot/port.subinterface-number
5. encapsulation isl vlan-identifier
6. xns network [number]
Command or Action Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
ip routing
Example:
Router(config)# ip routing
Enables IP routing on the router.
• Refer to the IP configuration chapters in the Cisco IOS
IP Routing Configuration Guide for guidelines on
configuring IP.
Step 4
interface type slot/port-adapter/port
Example:
Router(config)# interface FastEthernet1/0/0
Specifies the interface and interface configuration mode.
Step 5
ip route-cache distributed
Example:
Router(config-if)# ip route-cache distributed
Enables VIP distributed switching of IP packets on the
interface.
Step 6
encapsulation isl vlan-identifier
Example:
Router(config-if)# encapsulation isl 1
Defines the encapsulation format as ISL, and specifies the
VLAN identifier.