DHCP server icx 7750

[flemming_hansen]

After upgrading icx 7750 from 08.0.40 to 08.0.80 My multiple DHCP servers is malfunctioning.

A PC can get a lease, but a iPhone or IP phone cannot get a lease. 

What can be wrong?

[martin_martin]

I presume the PC is directly connected and the iphone via an access point.
Is the accesspoint working ? can you access it via the controller?

regards
Martin

[flemming_hansen]

Hi Thanks for your reply. 

The iPhones are connected via WiFi, and the IP phones are hardwired. They will not optain an IP address. PC's get an IP address, via WiFi and hardwired. 
I got a guest network on another VLAN, which has a DHCP server on a Palo Alto firewall, and the iPhone can get an IP from there.

I will find the configs.

regards
Flemming

[netwizz]

Are they within a different VLAN?

If yes, did you not save before the reload and perhaps loose some configuration settings such as the ip helper addresses?

[jijo_panangat]

You may run a wire shark on the server/client and check if the iPhone gets an dhcp-offer from server, At least we will know in which phase it is failing in the DORA process.

Please open a tac case as this requires a troubleshooting session to isolate the problem.