DHCP binding shows more IP released but wireless Clients are half of that

[raheemnpt]

Dear all.
I have got an issue with AP7502 which is running with wing 5.9.2.3. and enabled One AP as virtual controller having 20 APs adopted.

I have enabled DHCP in the virtual controller and its working fine.

The issue what we are facing is the DHCP binding table shows more IP's than wireless clients.

I have duly checked the DHCP binding after disabling wireless SSID whether the DHCP is getting released through LAN. But no IP's are getting released through LAN, only when SSID is enabled the clients are connected and DHCP binding table is being filed.

Once the clients becomes 65 we can see the same time DHCP binding table will be 90.

The DHCP lease time now kept as 4 hours. But we tried by reducing the lease time to 1 hours also.

Is the issue is with the AP "not showing with correct Clients list" or how this DHCP IP's are being released with no information in the client list but only happens when wireless radio is enable.

Kindly requesting to help me with the solution.

Thanks & Regards
Abdul Raheem

[raheemnpt]

Dear Chris
Thank you very much.
The lease time is 4 hours.
Do we have any CLI commands in Wing AP's to find the wireless clients history for last 24 hours or last one or two days?

[ckelly]

What's the lease time?

It's possible that, for example, there were a total of 90 clients that REQUESTED an IP....but then 25 'left' the WLAN...thus only leaving 65 actively connected.
In which case, if those 25 did not send a DHCP Release, then they will continue to consume an IP lease until the lease time expires on the DHCP server.

[raheemnpt]

Dear Robert
Thank you very much for replying.

I was duly checking the same way you have mentioned. "show ip dhcp binding all" and also the clients in GUI and using CLI "show wireless clients".
Then only I have posted the message.

[RobertZ]

You can try seeing if number match up between GUI & CLI,
here is CLI command " show ip dhcp binding"