Cisco Systems RJ-45-to-AUX manual Configuring the Cisco 2621 External Router for ISL Trunking, 134

			Fw	: 4.3(1)
			Sw	: 5.5(2)
DRAM			FLASH				NVRAM
Module Total	Used	Free	Total		Used	Free	Total Used Free
—————— —————	————	—————	——————		—————	—————	————— ———— ————

132640K 20331K 12309K 8192K 5548K 2644K 512K 185K 327K Uptime is 2 days, 19 hours, 3 minutes

Catalyst5000> (enable)

You can also use the show module command, as shown in the following output:

Catalyst5000> (enable) show module
Mod	Slot Ports		Module−Type	Model	Sub	Status
——	———— —————		——————————————————	————————————	——	————————
1	1	0	Supervisor III	WS−X5530	yes	ok
2	2	24	10/100BaseTX Ethernet	WS−X5225R	no	ok
Mod	Module−Name		Serial−Num

————————————————— ——————————

1	00011454261
2	00013405523
Mod	MAC−Address(es)	Hw	Fw	Sw
——	——————————————————————————	————	——————	————
1	00−50−bd−a0−b0−00 to 00−50−bd−a0−b3−ff	2.0	3.1.2	5.5(2)
2	00−50−0f−b7−ff−50 to 00−50−0f−b7−ff−67	3.1	4.3(1)	5.5(2)
Mod	Sub−Type Sub−Model Sub−Serial Sub−Hw

—————————— ———————— —————————— ——————

1 NFFC WS−F5521 0011455134 1.1

Catalyst5000> (enable)

Configuring the Cisco 2621 External Router for ISL Trunking

If you are going to use an external router for interVLAN routing, it helps to know how to configure it. Follow these steps to configure a 2621 for interVLAN routing:

1.Enter Interface Configuration mode for the Fast Ethernet 0/2 interface and force the port to use full duplex. Disable any IPs and use the no shutdown command:

Cisco2621(conf)# interface fastethernet 0/2

Cisco2621(conf−if)# no ip address

Cisco2621(conf−if)# no shutdown

Cisco2621(conf−if)# full−duplex

2.Create a subinterface for each VLAN and assign a description (optional), an IP address for the VLAN, an encapsulation type, and the VLAN number:

Cisco2621(conf−if)# interface fastethernet 0/2.2

Cisco2621(conf−if)# description vlan2

Cisco2621(conf−if)# ip address 63.78.39.2 255.255.255.0

Cisco2621(conf−if)# encapsulation isl 2

Cisco2621(conf−if)# interface fastethernet 0/2.3

Cisco2621(conf−if)# description vlan3

Cisco2621(conf−if)# ip address 63.78.39.3 255.255.255.0

Cisco2621(conf−if)# encapsulation isl 3

Tip Don’t forget to save your configuration. Use the show config command on each device to verify the configuration.

134