Missing secondary interface on Azure virtual machine after upgrade from RHEL 7 to RHEL 8

Solution In Progress - Updated -

Issue

  • After upgrading from multiple identical azure VMs from RHEL 7.9 to RHEL 8, some VMs lost their secondary interface.
  • In the Azure Portal under network configurations, two Mellanox MT27710 network cards are attached to the RHEL virtual machine. However, the RHEL machine detects only one network card.
  • No errors were observed during the upgrade however some VMs still lost its secondary interface.

Environment

  • Red Hat Enterprise Linux 8.X
  • Microsoft Azure Virtual Machine
  • Mellanox Technologies MT27710

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