Chapter 6 Broadband
VMG3925-B10A User’s Guide
66
Service
Category
Select UBR Without PCR for applications that are non-time sensitive, such as e-mail.
Select CBR (Continuous Bit Rate) to specify fixed (always-on) bandwidth for voice or data
traffic.
Select Non Realtime VBR (non real-time Variable Bit Rate) for connections that do not
require closely controlled delay and delay variation.
Select Realtime VBR (real-time Variable Bit Rate) for applications with bursty connections
that require closely controlled delay and delay variation.
VLAN (These fields appear when the Type is set to ADSL/VDSL over PTM.)
Active Select this to enable VLAN on this WAN interface.
802.1p IEEE 802.1p defines up to 8 separate traffic types by inserting a tag into a MAC-layer frame
that contains bits to define class of service.
Select the IEEE 802.1p priority level (from 0 to 7) to add to traffic through this connection.
The greater the number, the higher the priority level.
802.1q Type the VLAN ID number (from 1 to 4094) for traffic through this connection.
IP Address (This is available only when you select IPv4 Only or IPv4 IPv6 DualStack in the IPv4/IPv6
Mode field.)
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.
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.
MTU
MTU Enter the MTU (Maximum Transmission Unit) of each data packet, in bytes, that can move
through the WAN connection.
Routing Feature (This is available only when you select IPv4 Only or IPv4 IPv6 DualStack in the IPv4/
IPv6 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 IPv4 IPv6 DualStack in the IPv4/IPv6
Mode field.)
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.
Table 8 Network Setting > Broadband > Add New WAN Interface/Edit (Routing Mode) (continued)
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