Because your wireless guest network is not using authentication -- and I assume it is also not using encryption...
-- then the most likely culprit is DHCP itself. Put a LAN analyzer like Wireshark between the AP and the DHCP server, and watch to see whether DHCP requests are actually making it onto the LAN. If not, try capturing wireless packets to see whether the affected station is actually generating DHCP requests. If you still see nothing, look at the configuration of the station itself -- for example, is the DHCP Client service not running or is a personal firewall blocking DHCP? Work your way back through the path until you find the culprit.
Related Q&A from Lisa Phifer, Wireless Networking Expert
Wireless expert Lisa A. Phifer explains to what extent WEP cracking remains a worrisome issue. It all depends on your company's WLAN security policy.continue reading
Wireless expert, Lisa Phifer explains that it may not be worth enhancing Wi-Fi ad hoc mode since Wi-Fi Direct is a better alternative for enabling ...continue reading
Wireless expert Lisa Phifer responds to a question regarding a Mi-Fi and Android smartphone mobile hotspot comparison. She provides an in depth ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.