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dtd41's avatar
dtd41
Aspirant
Apr 13, 2019
Solved

DHCP Address reservations ignored?

This is an unmanaged switch connected to a GS105 unmanaged switch. I have two questions: (1) On the link between the GS108 and the host The left light is green, the right not light; (2) Anything to be done?

 

When I first connected this host to the GS105 (its about 100 ft away connected with a cat6 cable) it all worked. When I added the GS108 (same room with the host) DHCP stopped working and the host acts the same with or with the local switch. Setting a static IP works fine with no errors

  • This is a short part borrowed fro the GS105(v5) Installation Guide, very similar in the GS108(v4) Installation Guide - only the left LED indicates a 100 Mb/s (Fast Ethernet) link only. On a complete and healthy cable, a Gigabit Ethernet (1000 Mb/s) must be established.

     



    Hard to say what is killing the DHCP process here ...

4 Replies

  • First sentence is wrong should read on the link between the two switches - sorry :(  

    • schumaku's avatar
      schumaku
      Guru - Experienced User

      This is a short part borrowed fro the GS105(v5) Installation Guide, very similar in the GS108(v4) Installation Guide - only the left LED indicates a 100 Mb/s (Fast Ethernet) link only. On a complete and healthy cable, a Gigabit Ethernet (1000 Mb/s) must be established.

       



      Hard to say what is killing the DHCP process here ...

      • dtd41's avatar
        dtd41
        Aspirant

        Thanks. I did not expect a RTFM response on an unmanaged switch (my bad) thank for the kind and forgiving reply. Given that info the DHCP issue is probably due to network topology. Thank you again