D-Link Unified Access System DWS-3000 Series User Manual page 61

D-Link WLAN Controller Switch with Routing Disabled
If routing is disabled on the D-Link WLAN Controller Switch, it uses the network interface
address of the switch that you configured during the initial setup process.
NOTE: If you change the IP address of the network interface, the wireless function on
the switch automatically disables and re-enables. If you used DHCP for the IP
address assignment, make sure the lease does not expire.
D-Link WLAN Controller Switch with Routing Enabled
If the routing mode is enabled on the D-Link WLAN Controller Switch, you must create a
loopback or routing interface on the switch. Peer switches and APs use the IP Address of the
lowest loopback interface index to identify and communicate with the switch. If you do not
define a loopback interface, the wireless function uses the lowest index routing interface.
If routing is enabled, we strongly recommend that you define a loopback interface on the
switch. By creating a loopback interface, you can control which routing interface the wireless
function uses for its IP address when multiple routing interfaces exist. This can avoid
discovery problems for the discovery modes that use the IP address of the WCS. With the
loopback interface, the IP address of the wireless function is always the same.
In this context, the loopback interface does not refer to the loopback interface
NOTE:
with the 127.0.0.1 IP address. When you configure a loopback interface for
the wireless interface on the switch, it is essentially a permanent logical inter-
face and cannot have an IP address of 127.0.0.1. You must create a dedicated
subnet for the loopback interface, and other devices on the network must be
able to contact the IP address of the loopback interface.
The advantage of defining a loopback interface is that the interface never goes down. The
disadvantage is that network configuration is more complex because the loopback interface is
located on its own subnet and the rest of the network must know how to get to the subnet.
The network must have routes between the WCS and the APs you want it to manage. The APs
must be able to ping the IP address assigned to the wireless interface on the WCS. You
configure static routes on the switch through the configuration pages under LAN >
L3 Features > Router.
The following procedures show an example of how to enable routing and configure a IP
address on a routing or loopback interface by using the CLI:
1. Log on to the CLI and switch to Global Config mode:
(switch-prompt)
User: admin
Password:
(switch-prompt) >enable
Password:
(switch-prompt) #config
(switch-prompt) (Config)#
2. Enable routing.
(switch-prompt) (Config)#ip routing
4 Installing the D-Link Unified Access System
Discovering Access Points and Peer Switches 61