I started having an issue last week. I have numerous 1100 series Access Points in our network. We have laptops that authenticate through one vlan (1) and wireless IP phones (7920s) that authenticate through another vlan (2). I have a WDS system configured with oen master and 7 backups. Everything was working fine until last week. Now the AP where the 7920s authenticate is now giving an authentication failure message. The 7920 will authenticate with others APs with no problem. They will also authenticate with the questionable AP if I take it out of the WDS network. Laptops have no problem authenticating with the questionable AP. I have upgraded the fireware and cannot see any problems. Any ideas? Thanks.