Ubuntu 16.04 - enp2s0 became enp9s0 without hardware change - lost network

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I am running Ubuntu Server 16.04. This server gets rebooted few times a day due to one of my long running process failing and bash script recovering things, by simply doing reboot.



After few days of such a setup there is no networking, on start I get: "failed to start raise network interfaces". I've connected keyboard and screen, logged in to the machine and noticed that /etc/network/interfaces has reference to enp2s0, however ifconfig returns the enp9so. I've changed that in /etc/network/interfaces so it matches enp9so and rebooted server. It has worked, however I can't figure out why it has happened?



I am not sure if this helps, but all (3) machines in this LAN network had some network problems as well, I am not sure if they are victim or the cause of this issue.



Restarting the other machines didn't help. I had to restart the switch and the router that this switch is connected to.



Any idea why I am experiencing this issue? Thanks







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    up vote
    1
    down vote

    favorite












    I am running Ubuntu Server 16.04. This server gets rebooted few times a day due to one of my long running process failing and bash script recovering things, by simply doing reboot.



    After few days of such a setup there is no networking, on start I get: "failed to start raise network interfaces". I've connected keyboard and screen, logged in to the machine and noticed that /etc/network/interfaces has reference to enp2s0, however ifconfig returns the enp9so. I've changed that in /etc/network/interfaces so it matches enp9so and rebooted server. It has worked, however I can't figure out why it has happened?



    I am not sure if this helps, but all (3) machines in this LAN network had some network problems as well, I am not sure if they are victim or the cause of this issue.



    Restarting the other machines didn't help. I had to restart the switch and the router that this switch is connected to.



    Any idea why I am experiencing this issue? Thanks







    share|improve this question






















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I am running Ubuntu Server 16.04. This server gets rebooted few times a day due to one of my long running process failing and bash script recovering things, by simply doing reboot.



      After few days of such a setup there is no networking, on start I get: "failed to start raise network interfaces". I've connected keyboard and screen, logged in to the machine and noticed that /etc/network/interfaces has reference to enp2s0, however ifconfig returns the enp9so. I've changed that in /etc/network/interfaces so it matches enp9so and rebooted server. It has worked, however I can't figure out why it has happened?



      I am not sure if this helps, but all (3) machines in this LAN network had some network problems as well, I am not sure if they are victim or the cause of this issue.



      Restarting the other machines didn't help. I had to restart the switch and the router that this switch is connected to.



      Any idea why I am experiencing this issue? Thanks







      share|improve this question












      I am running Ubuntu Server 16.04. This server gets rebooted few times a day due to one of my long running process failing and bash script recovering things, by simply doing reboot.



      After few days of such a setup there is no networking, on start I get: "failed to start raise network interfaces". I've connected keyboard and screen, logged in to the machine and noticed that /etc/network/interfaces has reference to enp2s0, however ifconfig returns the enp9so. I've changed that in /etc/network/interfaces so it matches enp9so and rebooted server. It has worked, however I can't figure out why it has happened?



      I am not sure if this helps, but all (3) machines in this LAN network had some network problems as well, I am not sure if they are victim or the cause of this issue.



      Restarting the other machines didn't help. I had to restart the switch and the router that this switch is connected to.



      Any idea why I am experiencing this issue? Thanks









      share|improve this question











      share|improve this question




      share|improve this question










      asked May 18 at 12:46









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