So we have been fighting this issue for well over a year. It's been so long that I am having to relearn the configuration today. Here's the situation. We're running several D-Link DAP-2590's with multiple SSID's. There is an employee VLAN (10) and a guest VLAN (20). The employee VLAN has access to the internal office stuff and is unrestricted. The guest is limited on what they can do, speed, time, etc. All of this is managed in another part of the network and works fine. So here is the real issue... The D-Link AP web interface is very confusing and it seems no one online knows how to use it, or has a solution to how to use it. The user manual is total crap. It basically explains how to configure VLANs in one short sentence "Check the radio buttons to configure VLANs".... yeah thanks.
Also, D-Links support is even worse than their manual. They are clueless. It's like talking to a bunch of freaking monkeys! I have been through all three tiers of support probably 5 times over the last year or so trying to figure this out. I can get the access point configured so the employee and guest network run properly but I cannot get the management VLAN to work. For the past year, the procedure has been to configure the AP and pray I didnt miss anything because as soon as you apply, you can plug it into the trunk link and it will work, but you loose management connectivity. This is obviously not acceptable. I'm not above admitting that this may be my issue (conceptual misunderstanding). Ok here is the ideal configuration. Tell me if you see an issue with this:
VLAN 1 = Default
VLAN 10 = Employee (This is also where we want to manage AP's from)
VLAN 20 = Guest
VLAN 99 = Management & Native for trunk links
On our managed switch I will create a trunk link that trunks VLANs 1,10,20,99 to the APs and the trunk link will have its native VLAN set to 99. Ideally, we want to be able to manage the AP over the Employee VLAN, but I included the management vlan (99) in case thats not possible. Yes I know typically you should always use a management vlan, but in this case, its just easier to manage it directly over the employee vlan.
Here is a link to all the screen shots.
Can someone make suggestions or show me what im doing wrong here.
Also if it helps, here is the manual. Page 33 - 36 is on VLAN configuration.