Help Center/ Cloud Container Engine/ User Guide/ Clusters/ Upgrading a Cluster/ Troubleshooting for Pre-upgrade Check Exceptions/ Nodes' System Parameters
Updated on 2025-11-06 GMT+08:00
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Nodes' System Parameters

Check Items

Check whether the default system parameter settings on your nodes are modified.

Solutions

If the MTU value of the bond0 network on your BMS node is not the default value 1500, this check item will fail.

Non-default parameter settings may lead to service packet loss. Change them back to the default values. Take the following steps:

  1. Disable bond0. 

    sudo ip link set dev bond0 down

    Disabling bond0 will interrupt services. Exercise caution when performing this operation.

  2. Change the MTU value to 1500. 

    sudo ip link set dev bond0 mtu 1500

  3. Restart bond0. 

    sudo ip link set dev bond0 up

  4. Verify the modification result. (Ensure that the MTU has been updated.) 

    ip link show dev bond0 | grep mtu

    If the command output is mtu 1500, the setting has been modified.

Parent Topic: Troubleshooting for Pre-upgrade Check Exceptions