Specify an IP routing protocol such as Open Shortest Path First (OSPF), Routing Information
Protocol (RIP), Internet Gateway Routing Protocol (IGRP), or Enhanced IGRP (EIGRP) and identify
the network:
Cisco7505(config)#router rip
Cisco7505(config−router)#network 192.1.0.0
2.
Create a subinterface on a physical interface in Interface Configuration mode for the port connected to
the switch:
7505(config−router)#interface fastethernet2/0.100
3.
Specify the encapsulation type and VLAN number to use on the subinterface:
7505(config−subif)#encapsulation isl 100
4.
Assign an IP address and subnet mask to the subinterface:
7505(config−subif)#ip address 192.1.1.1 255.255.255.0
5.
To configure any other interfaces, repeat Steps 3 through 5 for each VLAN between the switches that
you want to route traffic:
6.
7505(config−router)#interface fastethernet2/0.200
7505(config−subif)#encapsulation isl 200
7505(config−subif)#ip address 192.1.2.3 255.255.255.0
Configuring IPX InterVLAN Routing on an External Router
In order to understand this section, you should be familiar with Cisco IOS software running on Cisco routers.
In this demonstration, we will configure a Cisco 7505:
To enable IP routing on the router, enter Global Configuration mode and use the ipx routing
command:
7505#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
7505(config)#ipx routing
1.
Specify an IPX routing protocol, such as RIP, and identify all the networks:
Cisco7505(config)#ipx router rip
Cisco7505(config−router)#network all
2.
Create a subinterface on a physical interface in Interface Configuration mode for the port connected to
the switch:
7505(config−router)#interface fastethernet2/0.1
3.
You must specify the encapsulation type and VLAN number to use on the subinterface:
7505 (config−subif)#ipx encapsulation isl 1
4.
Assign a network number to the subinterface and identify an encapsulation type for IPX, such as
snap, novell−ether, arpa or sap:
7505(config−subif)# ipx network 1 encapsulation sap
5.
To configure any other interfaces, repeat Steps 3 through 5 for each VLAN between the switches you
want to route traffic:
6.
7505(config−subif)#interface fastethernet2/0.2
7505(config−subif)#encapsulation isl 2
7505(config−subif)#ipx network 2 encapsulation sap
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