User's Manual

Specify Network Settings
66
AC1200 WiFi Cable Modem Router Model C6220
A login window opens.
3. Enter the modem router user name and password.
The user name is admin.
The default password is password. The user name and
password are case-sensitive.
The BASIC Home page displays.
4. Select ADV
ANCED > Advanced Setup > UPnP.
5. Select the Turn UPnP On check box.
By default, this check box is selected. If the T
urn UPnP On check box is cleared, the
modem router does not allow any device to automatically control router resources, such
as port forwarding.
6. T
ype the advertisement period in minutes.
The advertisement period specifies how often the modem router 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 use the current device status at the
expense of more network traffic. Longer durations can compromise the freshness of the
device status, but can significantly reduce network traffic.
7. T
ype the advertisement time to live 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 should
be fine for most home networks. If you notice that some devices are not being updated or
reached correctly, it might be necessary to increase this value.
8. Click the Apply button.
The UPnP Portmap Table displays the IP address of each UPnP device that is accessing
the modem router and which ports (internal and external) that device opened.
The UPnP
Portmap Table also displays what type of port is open and whether that port is still active
for each IP address.
9. T
o refresh the information in the UPnP Portmap Table, click the Refresh button.