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Ping problems

Use this information to resolve issues related to the ability to ping the CMM 2 or an I/O module.

A compute node in the chassis cannot ping the CMM 2 on management network​

Complete the following steps until the problem is solved:
  1. Make sure that the CMM 2 is powered on and the applicable ports are enabled on the CMM 2.
  2. Make sure that the compute node BMC (Lenovo XClarity Controller) has acquired an IP address from the CMM 2 by using the Setup utility on the node.
    Note
    If the CMM 2 recently lost connection to the DCHP server, you must reset the BMC by using the CMM 2 interface so that a new IP address can be acquired.
  3. In the CMM 2 user interface, click Chassis Management > Component IP Configuration and make sure that the IP address that is listed is the same as the IP address that is displayed in the Setup utility. If it is not the same IP address, configure the BMC network settings correctly or reset the BMC to automatically acquire a new IP address.
  4. Check Lenovo Data Center Support for any firmware updates that might apply to this problem. You can view the release notes for a firmware update to determine the issues that the update addresses.
  5. Remove the compute node from the chassis and check the connectors on the back of the node for bent pins. If the pins are bent, contact Lenovo Support.
  6. Install the compute node in another node bay to determine whether the problem remains. If the problem remains, make sure that the compute node is connected to a port that has been enabled and that the vLAN settings allow that port to connect to the network.
  7. Check Lenovo Data Center Support for any tech tips (service bulletins) that are related to network connectivity.
  8. (Trained service technician only) Complete the following steps:
    1. Force the link/duplex speed.
    2. Check the connectors on the I/O module to make sure that no pins are bent.
    3. Check the connectors on the chassis midplane to make sure that no pins are bent.
    4. Remove the CMM 2 and install a working CMM 2 in the same bay.
    5. If the problem is solved, replace the CMM 2 that you removed.

Multiple compute nodes in the chassis cannot ping the CMM 2 on management network​

Complete the following steps until the problem is solved:
  1. Make sure that the CMM 2 is powered on and the applicable ports are enabled on the CMM 2. If the CMM 2 is hung, reset the CMM 2.
  2. Reset the CMM 2.
  3. Check for firmware updates for the CMM 2.
  4. Reset the CMM 2 to factory defaults and attempt to discover the nodes again. Allow enough time for each BMC to acquire a network address.
  5. Replace the CMM 2.
  6. Make sure that the compute node BMC has acquired an IP address from the CMM 2 by using the Setup utility on the node.
    Note
    If the CMM 2 recently lost connection to the DCHP server, you must reset the BMC by using the CMM 2 interface so that a new IP address can be acquired.
  7. In the CMM 2 user interface, click Chassis Management > Component IP Configuration and make sure that the IP address that is listed is the same as the IP address that is displayed in the Setup utility. If it is not the same IP address, configure the BMC network settings correctly or reset the BMC to automatically acquire a new IP address.
  8. Check Lenovo Data Center Support for any firmware updates that might apply to this problem. You can view the release notes for a firmware update to determine the issues that the update addresses.
  9. Remove the compute node from the chassis and check the connectors on the back of the node for bent pins. If the pins are bent, contact Lenovo Support.
  10. Check Lenovo Data Center Support for any tech tips (service bulletins) that are related to network connectivity.
  11. (Trained service technician only) Complete the following steps:
    1. Force the link/duplex speed.
    2. Check the connectors on the CMM 2 to make sure that no pins are bent.
    3. Check the connectors on the chassis midplane to make sure that no pins are bent.
    4. Remove the CMM 2 and install a working CMM 2 in the same bay.
    5. If the problem is solved, replace the CMM 2 that you removed.

CMM 2 cannot ping a CMM 2 in a different chassis​

Complete the following steps until the problem is solved:
  1. Make sure that the CMM 2 are powered on and the applicable ports are enabled.
    1. If the CMM 2 is powered on and hung, reset the CMM 2.
    2. Make sure that the compute node BMC, the management node, and the CMM 2 are all on the same subnet.
  2. Verify that the cables between the CMM 2 and the top-of-rack switch are correctly connected and that the activity LEDs are lit on the applicable ports.
  3. Make sure that the management node has a correct IP address and is on the same subnet as the CMM 2.
  4. Make sure that the compute node BMC has acquired an IP address from the CMM 2 by using the Setup utility on the node.
    Note
    If the CMM 2 recently lost connection to the DCHP server, you must to reset the BMC by using the CMM 2 interface so that a new IP address can be acquired.
  5. In the CMM 2 user interface, click Chassis Management > Component IP Configuration and make sure that the IP address that is listed is the same as the IP address that is displayed in the Setup utility. If it is not the same IP address, configure the BMC network settings correctly or reset the BMC to automatically acquire a new IP address.
  6. Check Lenovo Data Center Support for any firmware updates that might apply to this problem. You can view the release notes for a firmware update to determine the issues that the update addresses.
  7. Check Lenovo Data Center Support for any tech tips (service bulletins) that are related to network connectivity.
  8. Remove the compute node from the chassis and check the connectors on the back of the node and on the midplane for bent pins. If the pins are bent, contact Lenovo Support.
  9. (Trained service technician only) Complete the following steps:
    1. Force the link/duplex speed.
    2. Check the connectors on the nodes and on the midplane to make sure that no pins are bent.
    3. Replace the I/O expansion card in the management node.
    4. Replace the management node.

A compute node cannot ping an I/O module​

Complete the following steps until the problem is solved:
  1. If you have recently updated the firmware for one or more devices in the chassis (I/O module) and have verified the network settings, install the previous level of firmware.
  2. Make sure that the I/O module is powered on and the applicable ports are enabled on the I/O module.
  3. Make sure that all network cables are correctly connected and that the activity LEDs are lit. If the cables are correctly connected and the LEDs are not lit, replace the cable.
  4. Check Lenovo Data Center Support for any firmware updates that might apply to this problem. You can view the release notes for a firmware update to determine the issues that are addressed by the update.
  5. Remove the node from the chassis and check the connectors at the back of the node for bent pins. If the pins are bent, go to Lenovo Data Center Support to submit a service request.
  6. Install the compute node in another node bay, if one is available. If the problem remains, make sure that the compute node is connected to a port that has been enabled and that the vLAN settings allow that port to connect to the network.
  7. Check Lenovo Data Center Support for any tech tips that are related to I/O-module connectivity.
  8. If the problem remains, replace the I/O module, and go to Lenovo Data Center Support to submit a service request.
  9. (Trained service technician only) Complete the following steps:
    1. Force the link/duplex speed.
    2. Check the connectors on the I/O module to make sure that no pins are bent.
    3. Check the connectors on the chassis midplane to make sure that no pins are bent.
    4. Remove the I/O module and install a working I/O module in the same I/O bay.
    5. If the problem is solved, replace the I/O module that you removed.

Multiple compute nodes cannot ping an I/O module​

Complete the following steps until the problem is solved:
  1. If you have recently updated the firmware for one or more devices in the chassis (I/O module or CMM 2), install the previous level of firmware.
  2. Make sure that the I/O module is powered on and the applicable ports are enabled on the I/O module.
  3. Make sure that all network cables are correctly connected and that the activity LEDs are lit.
  4. From the compute node operating system, verify that the network device is active. Check also the network settings, such as IP address, subnet mask (if you are using IPv4), DNS, DHCP settings, and vLAN settings to make sure that the settings match the settings of the network device. See the documentation that comes with the operating system for information about viewing network devices and checking the network settings.
  5. Check Lenovo Data Center Support for any firmware updates that might apply to this problem. You can view the release notes for a firmware update to determine the issues that are addressed by the update.
  6. Check Lenovo Data Center Support for any tech tips (service bulletins) that are related to network connectivity.
  7. (Trained service technician only) Complete the following steps:
    1. Force the link/duplex speed.
    2. Check the connectors on the I/O module to make sure that no pins are bent.
    3. Check the connectors on the chassis midplane to make sure that no pins are bent.
    4. Remove the I/O module and install a working I/O module in the same I/O bay.
    5. If the problem is solved, replace the I/O module that you removed.