Chapter 3 Message and Recovery Procedures

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 modules, the messages from the switch actually refer to the SFP module interfaces and modules.

Catalyst 3750, 3560, 3550, 2975, 2970, and 2960 Switch System Message Guide

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Cisco Systems 3750 manual Gbicsecurity Messages
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3750 specifications

The Cisco Systems 3750 series is a family of enterprise-class stackable switches that were designed to provide high-performance networking solutions for organizations requiring robust management features, security, and scalability. Known for their reliability and advanced capabilities, the 3750 series is particularly aimed at accommodating the demands of LAN environments in organizations ranging from small businesses to large enterprises.

One of the defining features of the Cisco 3750 series is its StackWise technology. This innovative feature enables the stacking of up to nine switches together, allowing them to function as a single logical unit. This results in simplified management, higher redundancy, and increased scalability. The StackWise technology allows for seamless failover and enhanced bandwidth between the stacked switches.

In terms of performance, the 3750 series supports Layer 2 and Layer 3 switching, offering routing capabilities to handle both traditional and modern network demands. It is equipped with advanced Quality of Service (QoS) features, ensuring that critical applications such as voice and video are prioritized for optimal performance.

The Cisco 3750 also features extensive security capabilities. It incorporates features such as IEEE 802.1X authentication, DHCP snooping, and dynamic ARP inspection to protect against unauthorized access and various network attacks. These enhancements help maintain data integrity and secure communications across the network.

Another noteworthy characteristic of the 3750 series is its support for Power over Ethernet (PoE). PoE allows for the delivery of power over Ethernet cables to connected devices, such as IP phones and wireless access points, facilitating simpler installations and reducing the need for additional power outlets.

The Cisco 3750 series also provides a comprehensive set of management tools. With features like Cisco's Embedded Event Manager (EEM) and extensive SNMP support, network administrators can efficiently monitor and manage network performance, troubleshoot issues, and maintain high availability.

Additionally, the series is compatible with Cisco's IOS software, which provides a rich set of features, including advanced routing protocols, multicast support, and extensive security options, further enhancing the functionality and versatility of the switches.

Overall, the Cisco Systems 3750 series stands out for its stackable design, high-performance features, security capabilities, and management tools, making it a popular choice for organizations looking for dependable and scalable networking solutions.
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