The GigaStack Gigabit Interface Converter (GBIC) is a Cisco proprietary Gigabit Ethernet stacking GBIC that offers high-speed interconnectivity to supporting switches.
Up to nine switches can be set up in point-to-point or various cascaded stack cabling configurations.
GigaStack is also fully compatible with switch clustering.
For information on the various cabling configuration options for the GigaStack GBIC, refer to Catalyst Switch GigaStack Configuration and Implications.
This document also discusses these error messages:
For switch compatibility information for the GigaStack GBIC, refer to GigaStack Gigabit Interface Converter Switch Compatibility Matrix.