Specifications

Configuring Routing Between VLANs
How to Configure Routing Between VLANS
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Configuring DECnet Routing over ISL
DECnet can be routed over VLAN subinterfaces using the ISL VLAN encapsulation protocols. The
DECnet Routing over ISL Virtual LANs feature provides full-feature Cisco IOS software DECnet
support on a per-VLAN basis, allowing standard DECnet capabilities to be configured on VLANs.
To route DECnet 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. decnet [network-number] routing [decnet-address]
4. interface type slot/port.subinterface-number
5. encapsulation isl vlan-identifier
6. decnet cost [cost-value]
DETAILED STEPS
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
Router(config)# decnet [network-number] routing
[decnet-address]
Example:
Router(config)# decnet routing 2.1
Enables DECnet on the router.
Step 4
interface type slot/port.subinterface-number
Example:
Router(config)# interface fastethernet 1/0.1
Specifies the subinterface on which ISL will be used.
Step 5
encapsulation isl vlan-identifier
Example:
Router(config-if)# encapsulation isl 200
Defines the encapsulation format as ISL (isl), and specifies
the VLAN identifier.
Step 6
decnet cost [cost-value]
Example:
Router(config-if)# decnet cost 4
Enables DECnet cost metric on an interface.