Configure Advanced Features
144
AC1900, N900, and N450 WiFi Cable Data Gateways
The BASIC Home screen displays.
5. Select ADV
ANCED > Advanced Setup > UPnP.
The UPnP screen displays.
The UPnP Portmap Table displays the IP address of each UPnP device that is accessing
the cable data gateway and which internal and external ports that device opened. The
UPnP Portmap Table also displays what type of port (that is, the protocol that is
associated with port) is open and whether that port is still active for each IP address.
6. T
o turn off UPnP, clear the Turn UPnP On check box.
By default, this check box is selected. If you clear the T
urn UPnP On check box, the
cable data gateway does not allow any device to automatically control the resources,
such as port forwarding (mapping), of the cable data gateway.
7. T
o change the advertisement period, in the Advertisement Period field, enter a new period
in minutes.
The advertisement period specifies how often the cable data gateway broadcasts its
UPnP information.
This value can range from 1 to 1440 minutes. The default period is
30 minutes. Shorter durations ensure that control points can obtain current device status
at the expense of additional network traf
fic. Longer durations can compromise the
freshness of the device status but can significantly reduce network traffic.
8. T
o change the advertisement time to live value, in the Advertisement Time to Live field,
enter a new value in hops.
The time to live for the advertisement is measured in hops (steps) for each UPnP packet
sent. Hops are the steps a packet takes between routers.
The number of hops can range
from 1 to 255. The default value for the advertisement time to live is 4 hops, which is fine
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