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Catalyst 3750, 3560, 3550, 2975, 2970, and 2960 Switch System Message Guide
OL-8551-04
Chapter 3 Message and Recovery Proced ures
GBIC_SECURITY Messages
Error Message GBIC-6-SERDES_MODULE_UNKNOWN: Unrecognizable GBIC found in [chars]
(module mask [hex]).
Note This message applies only to Catalyst 3550 switches.
Explanation The GBIC module presented data to the system that did not correctly identify the type
of the GBIC module. The switch will treat it as a generic GBIC module. [chars] is the name of the
interface in which the unknown module is installed, and [hex] is the module type value returned by
the module.
Recommended Action If the GBIC module fails to become operational, carefully remove and re-insert
it in the slot. If it continues to fail after re-insertion, it might be defective or incompatible with the
switch.
Error Message GBIC-6-SERDES_SERIAL_INV_DATA: Unrecognizable GBIC found in [chars]
(serial data [hex]).
Note This message applies only to Catalyst 3550 switches.
Explanation The GBIC module presented data to the system that did not correctly identify the type
of the GBIC module. The switch will treat it as a generic GBIC module. [chars] is the name of the
interface where the unrecognizable module is found, and [hex] is the data value returned by the
module.
Recommended Action If the GBIC module fails to become operational, carefully remove and re-insert
it in the slot. If it continues to fail after re-insertion, it might be defective or incompatible with the
switch.
GBIC_SECURITY Messages
This section contains the Cisco Gigabit Interface Converter (GBIC) and small form-factor pluggable
(SFP) module security messages. The GBIC and SFP modules have a serial EEPROM that contains the
serial number, security code, and cyclic redundancy check (CRC). When the module is inserted into the
switch, the software reads the EEPROM to recompute the security code and CRC. The software
generates an error message if the CRC is invalid or if the recomputed security code does not match the
one stored in the EEPROM.
Note The Catalyst 3750, 3560, 2975, 2970, and 2960 switch supports SFP modules and does not support GBIC
modules. Although the error message text refers to GBIC interfaces and mo dules, the messages from the
switch actually refer to the SFP module interfaces and modules.