Cisco Cisco IOS Software Release 12.2(55)SE

© 2015 Cisco Systems, Inc. All rights reserved.

Cisco IOS Release 12.2(55)SE runs on all Catalyst 3750, 3560, 2975, 2960-S, and 2960 switches and on 
Cisco EtherSwitch service modules.

Cisco IOS Release 12.2(55)SE1 runs on all Catalyst 3750, 3560, 2960-S, and 2960 switches and on 
Cisco EtherSwitch service modules.

Cisco IOS Release 12.2(55)SE2 runs on Catalyst 2960-S switches only.

The Catalyst 3750 switches and the Cisco EtherSwitch service modules support stacking through 
Cisco StackWise technology. The Catalyst 3560 and 2960 switches do not support switch stacking. 
Catalyst 2960-S and 2975 do support stacking. Unless otherwise noted, the term switch refers to a 
standalone switch and to a switch stack.

These release notes include important information about Cisco IOS Release 12.2(55)SE and later, and 
any limitations, restrictions, and caveats that apply to the releases. Verify that these release notes are 
correct for your switch:

If you are installing a new switch, see the Cisco IOS release label on the rear panel of your switch.

If your switch is on, use the show version privileged EXEC command. See the 

If you are upgrading to a new release, see the software upgrade filename for the software version. 
See the 

You can download the switch software from this site (registered Cisco.com users with a login password):