I have a network with 3xC520WS, 2xC100, 2xC200, 1xC320WS and 1xD230S1 /H200 it's all connected via 5 x DECO M9 plus with firmware 1.6.3

After changing the DHCP range on the Deco, the 3 C520WS are stuck on the old IP addresses.  Reboot will not help.   

After doing some testing it seems like the C520WS will stick to the first IP address it ever got. And even if rebooting the whole network it will take the same address it had even if the IP is now assigned to another unit first thereby creating an IP address conflict.

This seems to be only the C520WS that has this problem. 

Simple test to prove this. 

Setup the network with DHCP range 192.168.1.100 - 120 

Install a C520WS and add to network.

Then change the IP range to 

192.168.1.150-170

Then reboot network and C520 and you will see that the C520 still has an address in the 100-120 span. 

Assume a firmware update is needed to fix this bug?

Thanks 

Henrik