NetComm NB9 User Giude page 52

Field
Enable UPnP
Disable DHCP Server
Enable DHCP Server
Start IP Address
End IP Address
Lease Time
Enable IGMP Snooping
52
YML790 Rev1
Means
Universal plug and play (UPnP) allows traffic to pass
through the NB9/NB9W for applications using the
UPnP protocol. This feature requires one active WAN
connection. In addition, the client connecting to the
NB9/NB9W should support this feature.
UPnP also supports NAT Traversal which
can automatically solve many NAT-related
communications problems. UPnP enables
applications to assign dynamic port mappings to the
NB9/NB9W and delete them when connections are
complete.
A typical example is the MSN Messenger application
that runs on Windows. Instead of manually setting up
the port mappings UPnP enables MSN Messenger to
make the request to the NB9/NB9W which will setup
these ports dynamically. When MSN Messenger is
closed the port openings will be removed from the
NB9/NB9W's configuration.
Configure the second IP address and subnet mask for
LAN interface. It is possible to configure a second IP
address to access the NB9/NB9W on. Once this box
is checked you are able to enter the IP address and
subnet mask.
Disables the DHCP server. Only to be done if Static
IP address is set up.
Default: Enabled.
Default: 192.168.1.2. The first IP address that will
be issued to the first DHCP client connecting to the
NB9/NB9W using Ethernet cable or wirelessly.
Default: 192.168.1.254. The last IP address in the
DHCP pool to be issued to DHCP clients connecting
to the NB9/NB9W.
Default: 24 hours. The time an IP address is assigned
to a client before behind renewed.
IGMP specifies how a host can register a router in
order to receive specific multicast traffic. IGMP
Snooping allows the NB9/NB9W to capture IGMP
frames. When your NB9/NB9W hears an IGMP
report from a host for a given multicast group it adds
the host's port number for that group. When the NB9/
NB9W hears an IGMP Leave, it removes the host's
port from the table entry.
NB9/NB9W ADSL2+ VoIP Router