I have an issue which where wireless clients won't receive a DHCP address from the router and therefore won't connect... OR they randomly do get an address and will work fine, but this could be maybe 2 out of 10 devices for example.

The router is the DHCP server on LAN1 - which is linked via VLAN0 to P1-P4, and SSID1. Cabled devices work perfectly at all times.

What's really weird is that if I move SSID1 to VLAN1, and assign that to LAN1 it all works perfectly. The problem then is mobile devices can't see wired devices (because different VLAN) so phones can't print for example.

I don't have any VLAN tagging that's all disabled. I also have a wireless hot spot defined and working great on another VLAN, and an alternative gateway (on P5) via a Route Policy for traffic to a particular IP range.

I've reset the router and put all my config back in a couple of times, updated to the 4.3.1.1_BT firmware last week - but still it won't work.

Any ideas?

David