Problems With Access Points; Discovery Problems; Connection Problems - NETGEAR ProSafe WC7520 Reference Manual

Problems with Access Points

Discovery Problems

If the wireless controller does not discover any or all access points, check the following:
• Make sure that the wireless controller is connected to the LAN (see
On on page 179).
• Make sure that you have entered the correct IP range if the access points function in
different VLANs, are behind an IP subnet, or are already installed and working in
standalone mode (see
• Verify that access points that are already installed and working in standalone mode have
SSH and SNMP enabled (which is the default setting).
• Make sure that UDP port number 7890 is unblocked in the firewall.
• With the exception of access points in factory default state that are in the same Layer 2
network, 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.
• For access points that are installed across a Layer 3 network, make sure that either one
of the following options is enabled:
- Multicast routing for IP address 254.0.100.250 between the wireless controller and
the access point.
- DHCP option 43 (vendor-specific information) on the DHCP server. (Specifying a
DHCP server on the wireless controller automatically enables DHCP option 43 with
its own IP address.)

Connection Problems

When an access point is converted from standalone-AP mode to managed-AP mode, its
static IP address is changed to an IP address that is issued by the DHCP server, either one in
the network or one that is configured on the wireless controller. This occurs to ensure that
each managed access point has a unique IP address.
If there is no DHCP server or the access point cannot reach the DHCP server, the access
point remains in the Connecting state, attempting to obtain an IP address. If there is no
DHCP server in the network, configure one on the wireless controller (see
Server on page 62). When a DHCP server becomes available, the access point can
transition from the Connecting state to the Connected state.
ProSafe 20-AP Wireless Controller WC7520
Access Point Discovery
Troubleshooting
183
LAN Port LEDs Not
on page 49).
Manage the DHCP