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    • GS1200-5 changed hardware mac-address in the LAN by itself

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    • Posts: 55  Ally Member
      Hi AndyE,
      Thanks for the information. I will test it.
      And is GS1200-5 only connect two IP Phones?
      Do you encountered the problem after GS1200-5 MAC Address has changed?
    • Posts: 10  Freshman Member
      First Comment Friend Collector Nebula Gratitude Fifth Anniversary
      Hi Teemo, 
      the GS1200-5 and the two ip-phones are allways on and connected. There is a third device (a samsung tv receiver) which is sometime active.

      After the MAC Address has changed there are no further problems identified.

      br
      andy
    • Posts: 4  Freshman Member
      Hi AndyE,
      thanks for coming back to the main topic.

      The two GS1200-5 changed the MAC as follows:

      “B8:EC:A3:96:BF:DE“ original printed on the bottom and seen on the network. 
      Later „02:01:06:00:F7:FE“, even if there was made a firmware update and reset. 

      “B8:EC:A3:96:BF:EE“ original printed on the bottom and seen on the network. 
      Later „02:01:06:00:F7:FE“, even if there was made a firmware update and reset.

      One of the GS1200-8 has printed on the bottom the „02:01:06:00:F7:FE“ and works fine.
      I disconnected both -5 and connected one new -8. This networks works without any problem and change of MAC!

      regards Uwe

    • Posts: 10  Freshman Member
      First Comment Friend Collector Nebula Gratitude Fifth Anniversary
      edited September 2018
      Hi Uwe,

      thanks for your reply.

      This is exactly what I have expected. All device have the same MAC after it have changed. Your devices have the same like mine.

      It seems to be a bug.

      br andy

    • Posts: 246  Zyxel Employee
      @Uwe, @AndyE,
      Thank you for reporting this information. 
      We are investigating this problem.
    • Posts: 4  Freshman Member
      @Steven: Thanks for investigation the problem.

      One correction to my reports:

      "One of the GS1200-8 has printed on the bottom the „02:01:06:00:F7:FE“ and > works fine."

      Sorry, this was my mistake. GS1200-8 changed too !!!

      The original Information on the bottom is as follows:
      B8ECA396C975, Serial Number: S174351010338
      purchased in Germany, amazon.de, June 2018

      regards
      Uwe
    • Posts: 246  Zyxel Employee
      We have contacted you via private message. Please kindly check your message box.
    • Posts: 1
      I have this problem too

      GS1200-5
      V1.00(ABKM.0)C0
      Sticker printered:
      S184329002860
      B8ECA3FA3F12

      GS1200-8
      V1.0(ABME.0)C0
      Sticker printered:
      S184329004614
      B8ECA3FA478B

      MAC two device:
      02:01:06:01:F7:FD

      Router ->GS1200-8 -> GS1200-5

      DHCP client so it does not work and always Loop detect and breaking up connections two switch
    • Posts: 246  Zyxel Employee
      @Gme24,
      In order to provide you with a better assistance, we have contacted you via private message.
      Please kindly check your message box.
    • Posts: 1
      Faced the same problem. 2 devices have a MAC 02:01:06:00:F7:FE What to do? I purchased several devices that will work on the same network. If the rest will work the same, this is a nightmare. Help me please.

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