5-5
Catalyst 3650 Switch Hardware Installation Guide
OL-29734-01
Chapter 5 Troubleshooting
Resetting the Switch
To troubleshoot autonegotiation problems, try manually setting both sides of the connection. If this does
not solve the problem, there could be a problem with the firmware or software on the NIC. You can
resolve this by upgrading the NIC driver to the latest version.
Cabling Distance
If the port statistics show excessive FCS, late-collision, or alignment errors, verify that the cable distance
from the switch to the connected device meets the recommended guidelines. See the .
Resetting the Switch
If you have configured a new switch with a wrong IP address, or if all of the switch LEDs start blinking
when you try to enter Express Setup mode, you can clear the IP address that is configured on the switch.
Note
Resetting the switch reboots the switch.
To reset the switch:
1.
Press and hold the Mode button ().
The switch LEDs begin blinking after about 2 seconds. If the LEDs above the mode button turn solid
green, you can release the Mode button and run Express Setup to configure the switch. If the LEDs
do not turn solid green, continue with the next step.
2.
Continue holding down the Mode button. The LEDs stop blinking after an additional 8 seconds, and
then the switch reboots.
You can also configure the switch by using the CLI setup procedure. See
Finding the Switch Serial Number
If you contact Cisco Technical Assistance, you need to know the switch serial number.
Figure 5-1
shows
the serial number location. You can also use the
show version
privileged EXEC command to see the
switch serial number.
Figure 5-1
Switch Serial Number Location
PWR-C2-640WAC
PWR-C2-640WAC
SN: XXXNNNNXXXX
347807, 781-00797-01
CONSOLE
MGMT