Chapter 3 Message and Recovery Procedures

EC Messages

Error Message EC-5-L3STAYDOWN: [chars] will remain down as its port-channel [chars] is admin-down.

Note This message applies only to Catalyst 3550 switches.

Explanation On Layer 3 interfaces and aggregation interfaces, the administrative state of the aggregation interface overrides the administrative status of the Layer 3 interface. If the aggregation interface is administratively down, all interfaces in the aggregation interface are forced to be down. [chars] is the Layer 3 interface.

Recommended Action Enter the no shutdown interface configuration command on the aggregation interface.

Error Message EC-5-NOLACP: Invalid EC mode, LACP not enabled.

Explanation The EtherChannel mode cannot be set because LACP is not included in the software image.

Recommended Action Install a software image that includes LACP, and set the EC mode to on.

Error Message EC-5-NOPAGP: Invalid EC mode, PAgP not enabled.

Explanation PAgP is not included in the Cisco IOS image and the EtherChannel mode cannot be set to desirable or auto.

Recommended Action Obtain an image with PAgP included, or set the mode to on by using the channel-groupchannel-group-numbermode on interface configuration command.

Error Message EC-5-PORTDOWN: Shutting down [chars] as its port-channel is admin-down.

Explanation The administrative state of the port is controlled by the administrative state of its aggregate port. If the administrative state of the aggregate port is down, the administrative state of the port is also forced to be down. [chars] is the physical interface.

Recommended Action Enter the no shutdown interface configuration command on the aggregate port to activate the aggregation port.

Error Message EC-5-STAYDOWN: [chars] will remain down as its port-channel [chars] is admin-down.

Explanation The administrative state of the aggregation port overrides that of the affected port. If the aggregation port is administratively down, all ports in the aggregation port are forced to be administratively down. The first [chars] is the physical interface, and the second [chars] is the EtherChannel.

Recommended Action Enter the no shutdown interface configuration command on the aggregation port to activate (unshut) the aggregation port.

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

3-28

OL-8551-04

 

 

Page 46
Image 46
Cisco Systems 3750 manual Error Message EC-5-NOLACP Invalid EC mode, Lacp not enabled

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.