ZyXEL Communications 2602HWL-D3A manual Using Universal Plug n Play UPnP, ∙ 1. What is UPnP

	Prestige 2602HWL-D3A Support Notes
Label	Description
Redirect
Active	Select this check box to have the Prestige use traffic redirect if the normal WAN connection goes down.
	If you activate traffic redirect, you must configure at least one Check WAN IP Address.
Metric	This field sets this route's priority among the routes the Prestige uses.
	The metric represents the "cost of transmission". A router determines the best route for transmission by
	choosing a path with the lowest "cost". RIP routing uses hop count as the measurement of cost, with a
	minimum of "1" for directly connected networks. The number must be between "1" and "15"; a number
	greater than "15" means the link is down. The smaller the number, the lower the "cost".
Backup	Type the IP address of your backup gateway in dotted decimal notation. The Prestige automatically forwards
Gateway	traffic to this IP address if the Prestige's Internet connection terminates.
Back	Click Back to return to the previous screen.
Apply	Click Apply to save the changes.
Cancel	Click Cancel to begin configuring this screen afresh.

Using Universal Plug n Play (UPnP)

∙1. What is UPnP

UPnP (Universal Plug and Play) makes connecting PCs of all form factors, intelligent appliances, and wireless devices in the home, office, and everywhere in between easier and even automatic by leveraging TCP/IP and Web technologies. UPnP can be supported on essentially any operating system and works with essentially any type of physical networking media – wired or wireless.

UPnP also supports NAT Traversal which can automatically solve many NAT unfriendly problems. By UPnP, applications assign the dynamic port mappings to Internet gateway and delete the mappings when the connections are complete.

The key components in UPnP are devices, services, and control points.

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