Cisco Cisco Gigabit Ethernet GBIC SFP Modules 發佈版本通知

Upgrade all the switches in a series to the same software version; otherwise, the 
loop-breaking algorithm might never resolve itself. For example, if the stack 
includes only Catalyst 2900 series XL and 3500 series XL switches, they must run 
Release 12.0(5)XU or later. If the stack includes a mixture of Catalyst 2900 
series XL, 3500 series XL, and 3550 switches, all the 2900 XL and 3500 XL 
switches must run Release 12.0(5)XW or later, and all the Catalyst 3550 switches 
must run Release 12.1(4)EA1 or later.

For the Catalyst 2900 XL and 3500 XL software caveats, refer to the Release 
Notes for the Catalyst 2900 Series XL and 3500 Series XL, Cisco IOS 
Release 12.0(5)XU or later.

For the Catalyst 3550 multilayer switch software caveats, refer to the Release 
Notes for the Catalyst 3550 Multilayer Switch, Cisco IOS Release 12.1(4)EA1 or 
later.

The product documentation for the GigaStack GBIC and supporting switches is 
as follows:

Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration 
Guide (previously titled Cisco IOS Desktop Switching Software 
Configuration Guide)

Catalyst 2900 Series XL and Catalyst 3500 Series XL Command Reference 
(previously titled Cisco IOS Desktop Switching Command Reference) 

Catalyst 3550 Multilayer Switch Software Configuration Guide