Lpu Failure; Interface Failure - HP A8800 Installation Manual

Press the MPU RESET button to reset the MPU, and then verify that the corresponding RUN LED
2.
is on.
Make sure the MPU is seated properly. You can unplug the MPU, plug it in again, and make
3.
sure the MPU is seated properly.
If the router has empty MPU slots, plug the MPU into an empty slot and make sure the MPU is
4.
operating properly.
If the ALM LED is on, the MPU reports alarms. Use the display alarm command to locate and
5.
resolve the failures.
If there is still a failure, contact HP Support.
6.

LPU failure

When the LPU is operating properly, the RUN LED blinks and the ALM LED is off. At the same time,
the RUN LED on the LPU blinks and the ALM LED on the LPU is off.
When the RUN LED is off, the LPU fails. To troubleshoot the LPU:
Verify that the MPU is operating properly. For more information, see
1.
Use the display device command to determine if the software version is compatible with the LPU
2.
in the current slot. If not, upgrade the software to a compatible version.
Calculate the overall power consumption and make sure the power supply can provide enough
3.
power.
Verify that the LPU is seated properly. You can unplug the LPU, plug it in again, and make sure
4.
it is seated properly.
If the router has empty LPU slots, plug the LPU into an empty slot and make sure the LPU is
5.
operating properly.
If there is still a failure, contact HP Support.
6.

Interface failure

The MPU and LPU have LINK LEDs that indicate the interface status. When the link of an interface is
present and operating properly, the corresponding LINK LED is on.
If the LINK LED of an interface is off, the interface or the connecting cable may fail. To troubleshoot
the interface:
Make sure the MPU or LPU that provides the interface resides is operating properly. For more
1.
information, see
Examine the cable connection of the interface. For information on connecting a copper or fiber
2.
Ethernet interface, see
Verify that the cable is not broken. Use the cable to connect two interfaces of the same type that
3.
are operating 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.
If the interface uses a transceiver module, make sure the interface type is compatible with the
4.
transceiver module and that the transceiver module is compatible with the cable. For more
information, see
If the interface uses a transceiver module, replace the module with a normal transceiver module.
5.
If the problem persists, you can rule out the transceiver module failure.
"MPU failure" or "LPU
"Connecting the router to the
"Transceiver modules."
failure."
network."
46
"MPU failure."