MS Win2008R2 dhcp server: "BAD_ADDRESS"

[hsachse]

Apple iPhone with iOS 8.3.x did not get ip adresses from DHCP server. The DHCP server leases shows entries labeled with "BAD_ADDRESS".

Looking for a solution to fix the ip address assigning problem.

[Drew_C]

Hi Harmut,
Can you take a wireshark capture on your DHCP server to determine where the DHCP Declines are coming from?
Use the "bootp" filter in Wireshark to see only Bootp/DHCP related traffic. When you find a Decline, look for the Client MAC addresses to see if you can trace it to a device.

Was this previously working?

[hsachse]

If you have two options you could still decide to the third possibility 😉

Have to see, if i could create a mirror port on the switch the server is connected. Installing wireshark there would be not possible i think.

[Doug]

For me, real capture at the access point would be fine (eth0 only) if it's B@AP.
As Drew suggested you may also want to take one at the server too.

[Drew_C]

When I'm troubleshooting DHCP issues in our lab, I prefer to look at the server directly.

[hsachse]

Would you recommend tracing on access point or on controller data plane (port)?