D-Link DWS-3000 Series User Manual page 62

D-Link Unified Access System
D-Link Unified Switch with Routing Enabled
If the routing mode is enabled on the D-Link Unified 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 Unified Switch. With the
loopback interface, the IP address of the wireless function is always the same.
Note: In this context, the loopback interface does not refer to the loopback interface 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 interface 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 Unified Switch 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 Unified Switch. 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
3 Change to Interface Config mode for loopback interface 0, and assign an IP address and subnet mask.
(switch-prompt) (Config)#interface loopback 0
(switch-prompt) (Interface loopback 0)#ip address 10.1.1.1 255.255.0.0
4 [Optional] Change to Interface Config mode for slot 0, port 2, assign an IP address, and enable routing on the interface.
(switch-prompt) (Config)#interface 0/2
(switch-prompt) (Interface 0/2)#ip address 192.168.1.24 255.255.255.0
(switch-prompt) (Interface 0/2)#routing
You can also use the Web interface or SNMP to enable routing and configure an IP address. The following shows the
procedures to enable routing and configure an IP address on the switch by using the Web interface.
Page 62
Software User Manual
02/15/2011
Document 34CS3000-SWUM104-D10