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Forum Discussion

tantony's avatar
tantony
Luminary
Oct 24, 2018

Netgear switch dhcp

I have two Netgear switches (XS716T and XS728T) connected to a Juniper firewall.  When I connect the laptops to the switches, sometimes I get the incorrect dhcp and default gateway.  I called Juniper, and after 2 hours they said it's the switch causing the issue because I can see the switch making dhcp request.  

 

How do I stop the Netgear switches from making dhcp decisions?  

3 Replies

  • Check the switch and disable any DHCP snooping, DCHP static bindings, DHCP snooping persistent entries, ... 

    • tantony's avatar
      tantony
      Luminary

      schumaku

      so far, I'm only seeing DHCP snooping, and disabled on both switches.  I think I'm having the same issue, I'll double check tomorrow.

       

      I don't have any static bindings etc.

       

      I ran WireShark, and I can see the switches handling dhcp instead of the firewall for some reason.

      • schumaku's avatar
        schumaku
        Guru

        Operating bunches of XS7xxT in core, backhaul, and device access with customers and here at home/office. All fully DHCP transparent, all DHCP is handled by the designated systems for the various VLANs (some on similar security appliances, some on Windows AD Servers) in a transparent way (with hundreds of systems/devices btw.).

         

        Proabbly time for a factory reset and a manul reconfig from scratch? 

         

        Without more insight it's hard to help.

         

         

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