I’m new with Grandstream IP phones, I try to install round about 20 GXP1760W phones, and I get no IP address over DHCP. Only I configure the IP address manually, I get connction. I have one GXP1620 with the same issue. I work with a Linux DHCP server. on each phone I get a loop from the DHCP server with DHCPDISCOVER - DHCPOFFER - DHCPREQUEST - DHCPACK, and so on ans on. All other devices works fine. Where could be the failure?
Thanks for help