Resolving a network adapter problem

Learn about the possible problems and service actions that you can perform to resolve a network adapter problem.

About this task

Note: To determine the location of the PCIe adapter, see Identifying the location of the PCIe adapter by using the slot number.
Table 1. Network adapter problems and service actions
Problem Service action
System unable to find adapter
  1. Verify that the adapter is properly seated in a compatible slot.
  2. Install the adapter in a different compatible slot.
  3. Verify that the drivers for the adapter are installed.
  4. Verify that the most recent firmware is installed on the system. Otherwise, install the most recent firmware if it is not already installed.
  5. Restart the system.
  6. Replace the adapter.
  7. Replace the system backplane.
  8. Replace the central processing unit (CPU).
Adapter stops working suddenly
  1. If the system was recently installed, moved, serviced, or upgraded, verify that the adapter is seated properly and all associated cables are correctly connected.
  2. Inspect the PCIe socket and verify that there is no dirt or debris in the socket.
  3. Inspect the card and verify that it is not physically damaged.
  4. Verify that all cables are properly seated and are not physically damaged. If you recently added one or more new adapters, remove them and then test to determine whether the failing adapter is functioning properly again. If the network adapter is functioning again, review the IBM support tips to confirm that there are no PCI address, driver, or firmware conflicts. Then, reinstall the new adapters again one at a time until all adapters function properly.
  5. Replace the adapter.
  6. Replace the system backplane.
  7. Replace the CPU.
Link indicator light on the adapter is off
  1. Verify that the cable functions properly by testing it with a known working connection.
  2. Verify that the port or ports on the switch are enabled and functional.
  3. Verify that the switch and adapter are compatible.
  4. Replace the adapter.
Link light on the adapter is on, but there is no communication from the adapter
  1. Verify that the most recent driver is installed, or install the most recent driver if it is not already installed.
  2. Verify that the adapter and its link have compatible settings, such as speed and duplex configuration.
Other problems For information about adapter diagnostics, see Supporting diagnostics. For information about adapter user information, see User guides for GPUs and PCIe adapters.