Switch Documentation, Cisco IOS Software Release 12.1(20)EW

• Catalyst 4500 Series Switch Cisco IOS Command Reference, 12.1(20)EW

• Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide, 12.1(20)EW

• Catalyst 4500 Series Switch Cisco IOS System Message Guide, 12.1(20)EW

• Release Notes for the Catalyst 4500 Series Switch, Cisco IOS, 12.1(20)EW