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

This section describes the new and changed information for the GigaStack GBIC.

The Catalyst 3550 switches support the GigaStack GBIC.

For Catalyst 3550 switches running Release 12.1(4)EA1 or later, redundant loop 
configurations are supported in a cascaded stack of GigaStack GBIC ports in 
which all the ports are in the same stack. 

For more information about the support and function of redundant loop 
configurations, refer to the Catalyst GigaStack Gigabit Interface Converter 
Hardware Installation Guide. For software upgrade procedures, refer to the 
Release Notes for the Catalyst 3550 Multilayer Switch, Cisco IOS 
Release 12.1(4)EA1.

For Catalyst 2900 XL and 3500 XL switches running Release 12.0(5)XU or later, 
redundant loop configurations are supported in a cascaded stack of GigaStack 
GBIC ports in which all the ports are in the same stack.

For more information about the support and function of redundant loop 
configurations, refer to the Catalyst GigaStack Gigabit Interface Converter 
Hardware Installation Guide. For software upgrade procedures, refer to the 
Release Notes for the Catalyst 2900 Series XL and 3500 Series XL, Cisco IOS 
Release 12.0(5)XU or later.