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  1. OpenShift Bugs
  2. OCPBUGS-33414

mtu not applied to ipvlan interface

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    • Resolution: Duplicate
    • Icon: Critical Critical
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    • 4.14.z
    • Networking / multus
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      Description of problem:

      In a bare-metal cluster with ipvlan over vlan over bond interfaces, the mtu value defined for an ipvlan interface in a network-attachment-definitions is not properly applied to the pod after a cluster restart.
          

      Version-Release number of selected component (if applicable):

      OpenShift 4.14.22
          

      How reproducible:

      After a reboot of all the cluster worker nodes, like after an upgrade or applying a MachineConfig that triggers a reboot.
          

      Steps to Reproduce:

          1. Configure a bond interface
          2. Configure a vlan interface over the bond (with a MTU value of 9126)
          3. Configure via a NetworkAttachmentDefinition an ipvlan over the vlan interface with a specific mtu (set to 1500)
          4. Reboot all the worker nodes
          5. Check the mtu set for the ipvlan interface from the pod
          

      Actual results:

      MTU value defined for the master interface.
          

      Expected results:

      MTU value defined in the NetworkAttachmentDefinition
          

      Additional info:

      After some time, deleting the pod will recreate it with the correct MTU value.
          

              dosmith Douglas Smith
              dmunneor1@redhat.com Daniel Munne Ortega
              Weibin Liang Weibin Liang
              Carlos Goncalves, Marcelo Guerrero Viveros
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                Created:
                Updated:
                Resolved: