Installation guide

34 Release Notes for Catalyst 6000 Family Software Release 5.x

Troubleshooting

System Troubleshooting

This section contains troubleshooting guidelines for system-level problems:

• When the system is booting and running power-on diagnostics, do not reset the switch.

• After you initiate a switchover from the active supervisor engine to the standby supervisor

engine, or when you insert a redundant supervisor engine in an operating switch, always wait

until the supervisor engines have synchronized and all modules are online before you remove or

inserting modules or supervisor engines or perform another switchover.

• After you download a new Flash image, the next reboot might take longer than normal if Erasable

Programmable Logic Devices (EPLDs) on the supervisor engine need to be reprogrammed.

Whether this happens depends on which software version was running on the supervisor engine

before the download and which software version is downloaded. This can add up to 15 minutes

to the normal reboot time.

• If you have a port whose port speed is set to auto connected to another port whose speed is set

to a ﬁxed value, conﬁgure the port whose speed is set to a ﬁxed value for half duplex. Alternately,

you can conﬁgure both ports to a ﬁxed-value port speed and full duplex.

Module Troubleshooting

This section contains troubleshooting guidelines for module problems:

• If the Catalyst 6000 or 6500 series switch detects a port-duplex misconﬁguration, the

misconﬁgured switch port is disabled and placed in the “errdisable” state. The following syslog

message is reported to the console indicating the misconﬁgured port has been disabled due to a

late collision error.

SYS-3-PORT_COLL:Port 8/24 late collision (0) detected

%SYS-3-PORT_COLLDIS:Port 8/24 disabled due to collision

%PAGP-5-PORTFROMSTP:Port 8/24 left bridge port 8/24

Reconﬁgure the port-duplex setting and use the set port enable command to reenable the port.

• When you hot insert a module into a Catalyst 6000 or 6500 series chassis, be sure to use the

ejector levers on the front of the module to seat the backplane pins properly. Inserting a module

without using the ejector levers might cause the supervisor engine to display incorrect messages

about the module. For module installation instructions, refer to the Catalyst 6000 Family Module

Installation Guide.

• Whenever you connect a Catalyst 6000 or 6500 series port that is set to autonegotiate to an end

station or another networking device, make sure that the other device is conﬁgured for

autonegotiation as well. If the other device is not set to autonegotiate, the Catalyst 6000 or 6500

series switch autonegotiating port will remain in half-duplex mode, which can cause a duplex

mismatch resulting in packet loss, late collisions, and line errors on the link.