Specifications

Configuring Routing Between VLANs
How to Configure Routing Between VLANS
16
Figure 78 VLAN Packets Traversing the Shared Backbone
You can configure routing between any number of VLANs in your network. This section documents the
configuration tasks for each protocol supported with ISL encapsulation. The basic process is the same,
regardless of the protocol being routed. It involves the following tasks:
• Enabling the protocol on the router
• Enabling the protocol on the interface
• Defining the encapsulation format as ISL or TRISL
• Customizing the protocol according to the requirements for your environment
Configuring AppleTalk Routing over ISL
AppleTalk can be routed over VLAN subinterfaces using the ISL and IEEE 802.10 VLAN
encapsulation protocols. The AppleTalk Routing over ISL and IEEE 802.10 Virtual LANs feature
provides full-feature Cisco IOS software AppleTalk support on a per-VLAN basis, allowing standard
AppleTalk capabilities to be configured on VLANs.
To route AppleTalk over ISL or IEEE 802.10 between VLANs, you need to customize the subinterface
to create the environment in which it will be used. Perform the steps in the order in which they appear.
SUMMARY STEPS
1. enable
2. configure terminal
3. appletalk routing [eigrp router-number]
4. interface type slot/port.subinterface-number
5. encapsulation isl vlan-identifier
or
encapsulation sde said
6. appletalk cable-range cable-range [network.node]
7. appletalk zone zone-name
Token
Ring
Green
Fast Ethernet
Blue Red
Blue
Green
S6621
Red
Token
Ring
Blue
Green
Red