Chapter 6 Broadband
VMG3926-B10A User’s Guide
69
Obtain an IP
Address
Automatically
A static IP address is a fixed IP that your ISP gives you. A dynamic IP address is not fixed;
the ISP assigns you a different one each time you connect to the Internet. Select this if you
have a dynamic IP address.
DHCP
option 60/
Vendor ID
This field displays when editing an existing WAN interface. Type the class vender ID you
want the VMG to add in the DHCP Discovery packets that go to the DHCP server.
DHCP
option 61
IAD
This field displays when editing an existing WAN interface. Type the Identity Association
Identifier (IAD) you want the VMG to add in the DHCP Discovery packets that go to the
DHCP server.
DHCP
option 61
DUID
This field displays when editing an existing WAN interface. Type the DHCP Unique Identifier
(DUID) you want the VMG to add in the DHCP Discovery packets that go to the DHCP server.
DHCP
option 43
Enable
This field displays when editing an existing WAN interface. Type the vender specific
information you want the VMG to add in the DHCP Offer packets. The information is used,
for example, for configuring an ACS’s (Auto Configuration Server) URL.
Static IP
Address
Select this option If the ISP assigned a fixed IP address.
IP Address Enter the static IP address provided by your ISP.
Subnet
Mask
Enter the subnet mask provided by your ISP.
Gateway IP
Address
Enter the gateway IP address provided by your ISP.
Routing Feature (This is available only when you select IPv4 Only or IPv6/IPv4 DualStack in the IPv6/
IPv4 Mode field.)
NAT Enable Select this option to activate NAT on this connection.
Fullcone NAT
Enable
Select this option to enable full cone NAT on this connection. This field is available only when
you activate NAT. In full cone NAT, the VMG maps all outgoing packets from an internal IP
address and port to a single IP address and port on the external network. The VMG also
maps packets coming to that external IP address and port to the internal IP address and
port.
IGMP Proxy
Enable
Internet Group Multicast Protocol (IGMP) is a network-layer protocol used to establish
membership in a Multicast group - it is not used to carry user data.
Select this option to have the VMG act as an IGMP proxy on this connection. This allows the
VMG to get subscribing information and maintain a joined member list for each multicast
group. It can reduce multicast traffic significantly.
Apply as
Default
Gateway
Select this option to have the VMG use the WAN interface of this connection as the system
default gateway.
DNS Server (This is available only when you select IPv4 Only or IPv6/IPv4 DualStack in the IPv6/IPv4
Mode field.)
DNS Select Obtain DNS Info Automically if you want the VMG to use the DNS server
addresses assigned by your ISP.
Select Use Following Static DNS Address if you want the VMG to use the DNS server
addresses you configure manually.
DNS Server1 Enter the first DNS server address assigned by the ISP.
DNS Server 2 Enter the second DNS server address assigned by the ISP.
Table 8 Network Setting > Broadband > Add New WAN Interface/Edit (Routing Mode) (continued)
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