IBM 8275-416, Руководство пользователя, Страница: 107 / 156

Procedure C
Use this procedure if all devices connected to the switch are having communication
problems, the Fault LED is Off and the OK LED is On:
1. Reset the switch by disconnecting the power cord from the outlet, waiting 10
seconds, and reconnecting the power cord to the ac outlet.
v
If the problem goes away, resume using the switch.
v
If the status LEDs indicate a failure, go to “Procedure B” on page 90.
v
If the problem persists, check all the configuration parameters.
v
If the problem has still not been resolved, go to “Procedure D” and try to get
individual ports working.
Procedure D
Use this procedure if one device connected to the switch is having a communication
problem, the Fault LED is Off, the OK LED is On and other attached devices can
communicate through the switch:
1. If the port LED is Off (left LED On 10/100BASE-TX port and single port LED On
100BASE-FX port):
v
Check the cable and the attached device.
v
Check the configuration settings to ensure they are OK.
2. If the port Link LED is On:
a. Go to the Port Configuration Menu. Check that the port is administratively
enabled, has not been diagnostically disabled, has link up, and is in
spanning tree forwarding state.
b. Go to the Port Monitoring Menu. Check that the port is not a monitoring port.
c. Go to the VLAN Management Menu. Check that the port is a member of the
VLAN over which traffic from this device would transverse (this is usually
VLAN 1). See “Appendix E. Introduction to Virtual LANs (VLANs)” on
page 117 for more details.
d. Try pinging the attached device from another device in the same VLAN.
(The switch is a member of VLAN 1; all ports are in VLAN 1 by default.)
e. If ping is received, go to Step 5.
f. If the ping is not received, go to Step 3.
3. Restart the communications program on the failed connected device.
v
If the communications program appears to start without errors, observe the
port LED on the switch port. If it is On it might have gone away. Check the
port configuration parameters for possible causes of the failure.
v
If the problem persists, go to Step 4.
4. For each device that is having a communication problem, connect its segment
to another identically configured Ethernet port on the switch. Try each of the
remaining ports to determine if the problem will go away.
v
If the problem goes away, the problem might be in the switch. See “Obtaining
Service” on page 92.
v
If the problem persists, continue with Step 5.
5. The problem does not appear to be in the switch and the cables and devices
connected to the switch. The problem might be in the network applications or
other software running on the devices that are having the communication
problem. Refer to the networking software documentation for software problem
determination procedures, or consult your network administrator for assistance.
Chapter 7. Troubleshooting and Obtaining Service
91