Netgear WC7520 - ProSafe 20-AP Wireless Controller Manual De Referência

UDP port 6650. Used by the control channel between the wireless controller and the 
remote access point.

UDP port 7890. Used by the multicast discovery process. This port does not need to 
be unblocked in a configuration in which remote access points are located behind a 
NAT router.

Enable DHCP option 43 (vendor-specific information) on the DHCP server. Specify the 

wireless controller’s IP address to allow the access points to receive the wireless 
controller’s IP address and the DHCP server to assign IP addresses to the access points.

The DHCP server on the wireless controller automatically enables DHCP option 43 with 
its own IP address.

Access points behind a NAT router first need to be converted to managed access points 

and then be installed behind the NAT router.

Each access point needs to have an IP address. All access points that are the same 

model ship with the same default IP address. With the exception of access points in 
factory default state that are in the same Layer 2 network at the remote site, if more than 
one access point has the same IP address, then only one of them is discovered at a time. 
You have to add the access point to the managed list, change its IP address, and then 
run discovery again to discover the next access point with that IP address.

An access point needs to run at least its initial firmware release or a newer version. There 

are no other firmware requirements for the access point to function with the wireless 
controller.

For management and monitoring purposes, make sure that you give the 

remote access points at one site the same location name and that you 
create and assign meaningful building and floor names. For information 
about creating building and floor names, see 

on page 42; for information about assigning location, building, 

and floor names, see 

The following limitations apply after remote access points have been discovered:

Seamless Layer 2 roaming is supported for the clients of a remote access points, but 

seamless Layer 3 roaming is not supported for the clients across remote access points. 
When clients move from one IP subnet to another at the remote site, they are 
disconnected from their access point and need to reconnect to another access point.

If a remote access point is disconnected from the wireless controller, for example, 

because the VPN connection goes down, the following occurs:

The remote access point uses its last known configuration and functions as a 
standalone access point while continuously attempting to reconnect to the wireless 
controller.

If the access point uses WPA-PSK, WPA2-PSK, or WPA-PSK & WPA2-PSK 
authentication, it can continue to accept new clients. If the access point uses RADIUS