Chapter 3 Message and Recovery Procedures

MAC_LIMIT Messages

Explanation The size of the Layer 3 unicast TCAM entry is not sufficient to implement a feature. [chars] is the feature name (either Web Cache Communication Protocol [WCCP] or multiple VPN routing/forwarding [multi-VRF]) that requires the 144-bit TCAM size.

Recommended Action Modify the Switch Database Management (SDM) template to enable the switch to support the 144-bit Layer 3 TCAM. Use the sdm prefer extended-match, sdm prefer access extended-match, or sdm prefer routing extended-matchglobal configuration command, and then reload the switch by using the reload privileged EXEC command.

Error Message L3TCAM-3-TOO_MANY_VRF: Exceed the maximum number of VRF allowed.

Note This message applies only to Catalyst 3550 switches.

Explanation The number of virtual private networks (VPNs) exceeds the number allowed by the VPN routing/forwarding table on this hardware platform.

Recommended Action Reconfigure your switch to limit the number of VRFs. Do not define (name) more than seven VRFs with the ip vrf vrf-nameglobal configuration command.

Error Message L3TCAM-4-WCCP_ENABLE: Both VRF and WCCP are enabled, please remove either WCCP or VRF configuration.

Note This message applies only to Catalyst 3550 switches.

Explanation The switch does not support enabling of both VRF and WCCP.

Recommended Action Reconfigure your switch to use either VRF or WCCP.

MAC_LIMIT Messages

This section contains the MAC_LIMIT messages, which describe the entries in the MAC address table.

Error Message MAC_LIMIT-4-DROP: Vlan [dec] with Configured limit = [dec] has currently [dec] Entries.

Note This message applies only to Catalyst 3750, 3560, 2975, 2970, and 2960 switches.

Explanation The number of MAC address table entries for a VLAN is less than or equal to the maximum number allowed. The first [dec] is the VLAN ID, the second [dec] is the maximum number of MAC address entries, and the third [dec] is the number of entries in the MAC address table.

Recommended Action Your system administrator configures an action.

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

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Cisco Systems 3750 manual Maclimit Messages

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.