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TheOberjarl's avatar
TheOberjarl
Follower
Sep 12, 2025

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 payload called "SECS" that indicates how long a client has been waiting for an IP address. I've found that my RAX30 router never updates the "SECS" field when it sends DISCOVER packets. It is always kept at 0 secs, despite retrying a couple times a couple seconds apart.

 

While normally this isn't an issue, I've found that this anomalous behavior is keeping my RAX30 router from obtaining an IP address from my ISP's DHCP servers. I'm in contact with the ISP to try and resolve things on their side, but I'm also trying to understand if this is a bug in the RAX30 firmware.

 

Can anyone help me?

1 Reply

  • CrimpOn's avatar
    CrimpOn
    Guru - Experienced User

    The ISP does not respond to any of the DHCP Requests?