Configuring The Cisco 2621 External Router For Isl Trunking - Cisco RJ-45-to-AUX Brochure

DRAM
Module Total Used
—————— ————— ————
1 32640K 20331K 12309K
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
—— ———— ————— ——————————————————
1 1 0 Supervisor III
2 2 24 10/100BaseTX Ethernet
Mod Module−Name
—— ——————————————— ——————————
1
2
Mod MAC−Address(es)
—— ——————————————————————————
1 00−50−bd−a0−b0−00 to 00−50−bd−a0−b3−ff 2.0
2 00−50−0f−b7−ff−50 to 00−50−0f−b7−ff−67 3.1
Mod Sub−Type Sub−Model Sub−Serial Sub−Hw
—— ———————— ————————
1 NFFC WS−F5521
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.
Fw : 4.3(1)
Sw : 5.5(2)
FLASH
Free Total Used
————— —————— ————— —————
8192K
Serial−Num
00011454261
00013405523
—————————— ——————
0011455134 1.1
NVRAM
Free Total Used Free
————— ———— ————
5548K 2644K 512K
Model Sub Status
———————————— ——
WS−X5530 yes ok
WS−X5225R no
Hw Fw
———— ——————
3.1.2
4.3(1)
134
185K 327K
————————
ok
Sw
————
5.5(2)
5.5(2)