D-Link Unified Access System
Software User Manual
02/15/2011
Page 38
Document 34CS3000-SWUM104-D10
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 95
and
Appendix Appendix C:, <Link>“L3 Roaming Example” on page 213.
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
Unified Switch
