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.
Dig Deeper on Network Access Control
Related Q&A from Lisa Phifer
Is there a difference between a wireless access point vs. a router? Yes -- while the two wireless devices are related, they meet different needs in a... Continue Reading
Learn the differences between site-to-site VPNs vs. remote-access VPNs and find out about the protocols, benefits and the data security methods used ... Continue Reading
Need to send an email, check your flight's status or get ready for a presentation? You can do it all on your smartwatch, thanks to a slew of Apple ... 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.