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Forum Discussion
TheOberjarl
Sep 12, 2025Follower
Nighthawk RAX30 - DHCP Client Issues
I've noticed something strange whenever my RAX30 sends DHCP DISCOVER messages to my ISP DHCP server to obtain an IP address. The DHCP specification RFC2131 talks about a field in the DHCP DISCOVER pa...
CrimpOn
Sep 12, 2025Guru - Experienced User
The ISP does not respond to any of the DHCP Requests?
- TheOberjarlSep 13, 2025Follower
The ISP DHCP server doesn't seem to respond to DHCP Discover packets unless the SECS field is set to 4 or greater. For other routers, this occurs after one or two retries, but it doesn't work for the RAX30 because the SECS field is stuck at 0. I don't have a good idea what sort of configuration in the DHCP server would cause this behavior, nor why it would be configured that way. This is just what I observed in sending some experimental DHCP packets.