Cisco Catalyst 4000 series Hardware Troubleshoot page 7

b. Issue the show test 0 command in order to verify that the port has passed its last diagnostic
test on bootup. If F is indicted for that port, proceed as in step a.
6. Verify whether this device is on the same or a different VLAN. Remember that this is a Layer 2 (L2)
device and a router is required to route between VLANs.
7. If you connect to another switch, ask yourself these questions:
♦
What type of port is this? A trunk port?
♦
If it is a trunk port, what trunk encapsulations does it support?
♦
Is the port capable of EtherChannel?
Issue the show port capabilities command for a quick look at port capabilities. Refer to LAN
Technical Tips for more information on how to troubleshoot issues with trunking or EtherChannel.
Port status shows not connected, faulty, disabled, inactive, or errdisable
Possible Port Status
Status
Port is operational and connected to end device. A
status of connected does not mean the ports are
connected
error−free. If there are errors on the ports, proceed
to the Seeing errors on the ports section of this
document.
Nothing is connected to the port. Check or swap
notconnect
cables. Verify the operation of the end device.
Possible hardware failure. Issue the show test
command in order to verify. If F displays for a
faulty
port, proceed as in step 5 of the Can not connect to
a remote host on the switch section of this
document.
Manually disabled. Issue the set port enable
<mod/port> command in order to enable the port.
disabled
If the port status does not change to enable, issue
the show module command in order to determine
if the module is disabled.
Port belongs to a VLAN that does not exist. Issue
inactive
the set vlan <vlan> command in order to add a
VLAN.
Port had been shut down due to errors. Refer to the
errdisable
Recovering From errDisable Port State on the
CatOS Platforms document for more information.
Seeing errors on the ports
Complaints of poor performance by users can sometimes translate to errors on switch ports. Output from the
port error counters command help you troubleshoot connectivity problems.
◊
Remove the module and inspect for bent pins. Reseat the module, firmly press down
the ejector levers, and tighten the captive installation screws. If the output of the
show module command status is still faulty, try the module in another slot. Slot 2
accepts line cards or a supervisor engine. If necessary, power off/on the switch. If the
status is still faulty, the module has failed.
Description and Work Around