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Catalyst 3750-X, 3750-E, 3560-X, and 3560-E Switch System Message Guide
OL-9772-05
Chapter 2 Message and Recovery Procedures
EPM Messages
Error Message EC-5-UNBUNDLE: Interface [chars] left the port-channel [chars].
Explanation The listed interface left the specified EtherChannel. The first [chars] is the physical
interface, which can be a switch port or a routed port, and the second [chars] is the EtherChannel.
Recommended Action No action is required.
Error Message EC-5-UNSUITABLE: [chars] will not join any port-channel, [chars].
Explanation One of the interfaces cannot join the EtherChannel because it is configured for PortFast,
as a VLAN Membership Policy Server (VMPS), for 802.1x, as a voice VLAN, or as a SPAN
destination port. All of these are illegal configurations for EtherChannels. The first [chars] is the
interface name, and the second [chars] describes the details of the illegal configuration.
Recommended Action Remove the illegal configuration and reconfigure the port.
EPM Messages
Error Message EPM-6-AUTH_ACL: POLICY [chars]| EVENT [chars]
Explanation The switch has sent or received a download request for a downloadable ACL (dACL).
The first [chars] is the dACL policy. The second [chars] is the event.
Recommended Action No action is required.
ETHCNTR Messages
Error Message ETHCNTR-3-HALF_DUX_COLLISION_EXCEED_THRESHOLD: Collision at [chars]
exceed threshold. Consider as loop-back.
Explanation The collisions at a half-duplex port exceeded the threshold, and the port is treated as a
loopback. On switches that support Power over Ethernet (PoE), this message might be displayed
when a device that can be powered by either a PoE switch port or by AC power is not being powered
by an external AC power source and is connected to a port that has been configured with the power
inline never interface configuration command. [chars] is the port where the threshold was exceeded.
Recommended Action On switches that support PoE, remove the device or configure the port by
entering the power inline auto, shutdown, and no shutdown interface configuration commands.
No action is required on non-PoE switches. The port is error disabled until the problem is resolved.
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