Cisco Systems 3750 instruction

Chapter 3 Message and Recovery Procedures

ETHCNTR Messages

Explanation There are too many VLANs and routed ports (if the switch supports routed ports) configured. [chars] is the short interface name, such as Gi1/0/1 on a Catalyst 3750 switch, or the VLAN name, such as VLAN0002.

Recommended Action Reduce the total number of VLANs and routed ports to less than 1023. To preserve configuration and connections across reboots, save the configuration.

Error Message ETHCNTR-3-RA_ALLOC_ERROR:RAM Access [chars] [chars] memory allocation failure.

Note This message applies only to Catalyst 3550 switches.

Explanation A request to read from or write to the RAM access failed its memory allocation. The first [chars] is the RAM access command that failed, and the second [chars] describes whether processor memory allocation or I/O memory allocation failed.

Recommended Action Find out more about the error by using the show tech-supportprivileged EXEC command and by copying the error message exactly as it appears on the console or system log and entering it in the Output Interpreter tool. Use the Bug Toolkit to look for similar reported problems. For more information about these online tools and about contacting Cisco, see the “Error Message Traceback Reports” section on page 2-7for more information.

Error Message ETHCNTR-3-RA_REPLY_ERROR: Invalid reply to RAM Access [chars] request ([hex]) from satellite [dec].

Note This message applies only to Catalyst 3550 switches.

Explanation A request to read from or write to the satellite RAM produced an unexpected reply. [chars] is the request type (read or write), [hex] is the address, and [dec] is the satellite number.

Error Message ETHCNTR-3-SNAP_FORWARDING_UNSUPPORTED: IPv4/IPv6 SNAP forwarding will be disabled because switch [dec] does not support this feature.

Note This message applies only to Catalyst 3750 switches.

Explanation A switch that is being added to the stack does not support the forwarding of

IP Version 4 (IPv4) and IP Version 6 (IPv6) frames with Subnetwork Access Protocol (SNAP) encapsulation. If this occurs, forwarding of IPv4 and IPv6 frames is disabled in the switch stack. [dec] is the stack member number.

Recommended Action Replace the stack member with a switch that supports forwarding of IPv4 and IPv6 frames with SNAP encapsulation.

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

	OL-8551-04	3-33

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.