H3C Technologies H3C S12500 Series Switches - Manual (Page 100)

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1. Verify that the MPU is operating properly. For more information, see " MPU failure ."
2. Use the display device command to verify that the software version is compatible with the
switching fabric module in the current slot. If the software version is incompatible with the
switching fabric module, upgrade the software to a compatible version.
3. Calculate the overall power consumption, and make sure your power supply can provide enough
power.
4. Verify that the switching fabric module is fully seated. You can unplug the switching fabric module,
plug it again, and make sure the switching fabric module is fully seated.
5. If the switch has empty switching fabric module slots, plug the switching fabric module into an
empty slot, and verify that the switching fabric module can operate properly.
6. If the failure still exists, contact the local agents or technical support engineers.
Interface failure
Both the MPU and LPU provide the LINK LEDs indicating the interface status. When the link of an
interface is present and is operating properly, the corresponding LINK LED is on.
If the LINK LED of an interface is off, the interface or the connecting cable may have failed.
To troubleshoot the interface:
1. Verify that the MPU or LPU where the interface resides is operating properly. For more information,
see "
MPU failure " or " LPU failure ."
2. Check the cable connection of the interface. For how to correctly connect the cable to an Ethernet
interface with an RJ-45 connector or an optical interface, see "Connecting your switch to the
network."
3. Check whether the cable is broken. Use the cable to connect two interfaces of the same type that
work properly. If the LEDs of the two interfaces are on, the cable is normal. Otherwise, the cable
fails. Use a compliant cable to connect the interface.
4. If the interface uses a transceiver module, verify that the interface type is compatible with the
transceiver module and that the transceiver module is compatible with the cable. For more
information, see "Appendix C Transceiver modules."
5. If the interface uses a transceiver module, make sure the current transceiver module operates
properly by replacing a normal transceiver module.
6. Use the display interface command to verify that the interface is UP. If the interface is not UP, use
the undo shutdown command to bring up the interface.
7. Verify that the speed and duplex settings of the interfaces of a link are the same. Make sure two
interfaces can operate together.
8. If the failure still exists, contact the local agents or technical support engineers.
NOTE:
When an interface fails, if the switch has an idle interface of the same type, you can plug the cable into the
idle interface.
Technical support
If the failures still exist, contact the agents or technical support engineers. Before contacting the customer
service, prepare the following information to help the agents solve the problem as quickly as possible: