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36 © 2001- 2006 D-Link Corporation/D-Link Systems, Inc. All Rights Reserved.
D-Link Unified Access System User Manual
keeps the same IP address that the switch originally assigned it. All traffic the client sends and
receives goes through the switch.
Figure 10. Inter-Subnet Roaming
In the tunneling configuration, you can use ACL lists and QoS parameters to ensure that time-
sensitive traffic, such as VoIP, takes priority over other WLAN traffic.
For many IP phone systems, you must connect a call server to a wired port on the L3 tunnel
subnet. You must also either configure DHCP relay on the switch or configure the switch to be
a DHCP server. APs, peer switches, and other routers cannot be connected to the L3 tunnel
subnet.
For more information about L3 tunnelling and how to configure it, see “Configuring a VAP
for L3 Tunnels” on page 91 and Appendix C, “L3 Roaming Example” on page 187.
WCS
Client
IP: 10.20.20.12
AP 1
IP: 192.168.24.173
AP 2
IP: 192.168.38.66
AP 3
IP: 192.168.85.49
L3 Tunnel Subnet
IP: 10.20.20.0
Client
IP: 10.20.20.12
Client
IP: 10.20.20.12