D-Link DSR-250N User Manual page 28

Unified Services Router
Once UPnP is enabled, you can configure the router to detect UPnP -supporting
devices on the LAN (or a configured VLAN). If disabled, the router will not allow for
automatic device configuration.
Configure the following settings to use UPnP:

Advertisement Period: This is the frequency that the router broadcasts UPnP
information over the network. A large value will minimize network traffic but
cause delays in identifying new UPnP devices to the network.

Advertisement Time to Live: This is expressed in hops for each UPnP packet. This
is the number of steps a packet is allowed to propagate before being discarded.
Small values will limit the UPnP broadcast range. A default of 4 is typical for
networks with few switches.
Fig ure 9: UPnP Co nfig uratio n
UPnP Port map Table
The UPnP Port map Table has the details of UPnP devices that respond to the router's
advertisements. The following information is displayed for each detected device:

Active: A yes/no indicating whether the port of the UPnP device that established a
connection is currently active

Protocol: The network protocol (i.e. HTTP, FTP, etc.) used by the DSR

Int. Port (Internal Port): The internal ports opened by UPnP (if any)

Ext. Port (External Port): The external ports opened by UPnP (if any)
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User Manual