D-Link DWS-3160-24TC Reference Manual page 430

DWS-3160 Series Gigabit Ethernet Unified Switch Web UI Reference Guide
Parameter
SSID
Hide SSID
Deny Broadcast
VLAN
MAC Authentication
Redirect
Redirect URL
Wireless ARP
Suppression Mode
L2 Distributed
Tunneling Mode
L3 Tunnel
L3 Tunnel Status
L3 Tunnel Subnet
Description
Enter Service Set Identifier (SSID) of the network, which is an alphanumeric key
that uniquely identifies a wireless local area network.
Tick the check box to hide the SSID broadcast to discourage stations from
automatically discovering the access point.
Tick the check box to prohibit the AP from responding to client probe requests
Enter a VLAN ID.
Click Local or RADIUS to enable MAC Authentication. The MAC address of the
client must be configured at the local switch or the external RADIUS server.
Select the HTTP radio button to redirect wireless clients to a custom Web page.
Enter the URL where all initial HTTP accesses should be redirected to. This text
box is accessible only when HTTP is selected as the redirect type.
Use the drop-down menu to enable or disable the APs to reduce the number of
broadcasted ARP requests on the wireless interfaces. Reducing broadcasts helps
conserve power on the wireless clients. The wireless clients that use power-save
mode must wake up and use more power when they detect broadcast frames.
NOTE: Enabling this feature slightly degrades AP packet forwarding performance
due to extra packet filtering to find DHCP packets and extra processing for
ARP request and reply packets. Networks that do not use IPv4 should not
enable this feature.
The distributed L2 tunneling mode supports L3 roaming for wireless clients without
forwarding any data traffic to the Unified Switch. Use the drop-down menu to
enable or disable the mode. L2 tunneling is recommended when the Unified Switch
does not support hardware forwarding acceleration or hardware-based L2 tunnels.
NOTE:
1. When there is only one switch managing all APs and that switch goes
down, all APs shut down their radios and the tunnel is terminated. After the
switch recovers and the AP becomes managed again, the client that was
previously tunneling traffic will re-associate and obtain an IP address on
the network where its currently located. This IP address will be different
from the IP address it was using when it was tunneling, and the traffic will
not be tunneled.
2. If the network has peer switches and the tunnel is established between
the APs managed by the peer switches then, when a switch managing
the home AP fails, the switch managing the association AP detects the
failure and terminates the tunnel. At this point the client is
disassociated. When the client re-associates it obtains a new IP
address.
3. If the switch managing the association AP fails, then the scenario is the
same as in item 1 above. The AP takes down all radios and the clients
disassociate.
The L3 Tunnel feature allows mobile stations to maintain their IP connections while
roaming from one access point to another access point even when these access
points are attached to different IP subnets.
NOTE: When L3 tunneling is enabled the VLAN ID is not used. In fact, the switch
puts the management VLAN ID, if any, on the tunneled packets.
NOTE: If the wireless network topology changes (for example, a Unified Switch
reboots) while the L3 tunneling feature is in use, you should perform an
ARP refresh on wired clients to speed up the process of re-establishing
connectivity to the tunneled network.
Display the status of L3 tunnel.
Enter the subnet of L3 tunnel. The network IP address you enter in this field must
be in the same subnet as a routing interface for the WLAN on the Switch.
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