D-Link DWS-3024L User Manual - Page 100
L3 Roaming Example, shows, the laptop users are connected to different WLAN
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D-Link Unified Access System User Manual In general, only clients that transmit and receive time-sensitive data while roaming need to take advantage of this feature. Figure 43 shows a network with two APs that are controlled by a D-Link Unified Switch. The APs and switch are all on different subnets. Figure 43. L3 Roaming Example Associated With: AP1 SSID: VoIP Network IP: 192.168.100.51 AP1 3 VAPs SSID - Guest Network SSID - Company WLAN SSID - VoIP Network Unified Switch Associated With: AP1 SSID: Company WLAN IP: 192.168.20.20 Associated With: AP2 SSID: Guest Network IP: 192.168.30.11 AP2 3 VAPs: SSID - Guest Network SSID - Company WLAN SSID - VoIP Network Associated With: AP2 SSID: VoIP Network IP: 192.168.100.52 Both of the APs in Figure 43 use the same default profile. The default profile has three virtual access points (VAPs) enabled, and each VAP uses a different network (SSID). When users search for available wireless networks, all three SSIDs appear in the list of networks. The laptop clients connect to the Company WLAN or Guest Network, and the VoIP phones connect to the VoIP Network. The L3 Tunnel feature is enabled on the VoIP network, but it is disabled on the Guest and Company WLAN networks since those networks are primarily for data traffic. The VoIP network is for voice traffic. L3 Roaming uses IP tunneling so clients appear to be on the same subnet even though the APs are on different subnets. In the sample network that Figure 43 shows, the laptop users are connected to different WLAN networks on two different APs. The Internet phone users are connected to the same WLAN network on two different APs. On the VoIP Network, the phone users can seemlessly roam between AP1 and AP2 without service interruption or the need to re-authenticate or change networks. The Unified Switch uses a VLAN routing interface as a separate logical network configured for the L3 tunnel network. This network is the L3 tunneling subnet and has a network address of 192.168.100.0. Tunneling is not expected to work with port-based routing interfaces. All tunneled routing interfaces must be VLAN routing interfaces. APs should not be attached via port-based routing interfaces as well. 100 © 2001- 2008 D-Link Corporation. All Rights Reserved.