MTU changes from 9000 to 1500 constantly

Solution Verified - Updated -

Issue

  • MTU changes from 9000 to 1500 constantly
  • Seeing messages in the logs similar to those below:
Aug  7 14:58:11 localhost kernel: ixgbe 0000:0c:00.0 enp12s0: changing MTU from 9000 to 1500
Aug  7 14:58:57 localhost kernel: ixgbe 0000:0c:00.0 enp12s0: changing MTU from 9000 to 1500
Aug  7 14:59:47 localhost kernel: ixgbe 0000:0c:00.0 enp12s0: changing MTU from 9000 to 1500
Aug  7 14:59:55 localhost kernel: ixgbe 0000:0c:00.0 enp12s0: changing MTU from 9000 to 1500

Environment

  • Red Hat Enterprise Linux 7
  • NetworkManager

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