Chapter 8 Broadband
VMG/EMG/AM/DM/GM Series User’s Guide
192
Secondary DNS
Server
Enter the second DNS server address assigned by the ISP.
Routing Feature (This is available only when you select IPv4 Only or IPv4 IPv6 DualStack in the IPv4/IPv6 Mode field.)
NAT Click this switch to activate NAT on this connection.
IGMP Proxy 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.
Click this switch to have the Zyxel Device act as an IGMP proxy on this connection.
This allows the Zyxel Device to get subscribing information and maintain a joined member list for
each multicast group. It can reduce multicast traffic significantly.
Apply as Default
Gateway
Click this switch to have the Zyxel Device use the WAN interface of this connection as the system
default gateway.
Fullcone NAT
Enable
Click this switch to enable or disable full cone NAT on this connection.This field is available only
when you activate NAT.
In full cone NAT, the Zyxel Device maps all outgoing packets from an internal IP address and port
to a single IP address and port on the external network. The Zyxel Device also maps packets
coming to that external IP address and port to the internal IP address and port.
6RD
The 6RD (IPv6 rapid deployment) fields display when you set the IPv6/IPv4 Mode field to IPv4 Only. See IPv6 Rapid
Deployment on page 185 for more information.
Click this switch to tunnel IPv6 traffic from the local network through the ISP’s IPv4 network.
Automatically
configured by
DHCPC
This option is configurable only when you set the method of encapsulation to IPoE.
Select this to have the Zyxel Device detect the relay server automatically through DHCP.
Manually
Configured
Select this if you have the IPv4 address of the relay server.
Service Provider
IPv6 Prefix
Enter an IPv6 prefix for tunneling IPv6 traffic to the ISP’s border relay router and connecting to the
native IPv6 Internet.
IPv4 Mask
Length
Enter the subnet mask number (1~32) for the IPv4 network.
Border Relay
IPv4 Address
When you select Manually Configured, specify the relay server’s IPv4 address in this field.
DHCPC Options (This is available only when you select IPv4 Only or IPv4 IPv6 DualStack in the IPv4/IPv6 Mode field.)
Request Options Select Option 42 to have the Zyxel Device get IP addresses of NTP time servers from DHCP
packets sent from the DHCP server.
Select Option 43 to have the Zyxel Device get vendor specific information from DHCP packets
sent from the DHCP server.
Select Option 120 to have the Zyxel Device get an IP address or a fully-qualified domain name of
a SIP server from DHCP packets sent from the DHCP server.
Select Option 121 to have the Zyxel Device get static route information from DHCP packets sent
from the DHCP server.
Sent Options
option 60 Select this and enter the device identity you want the Zyxel Device to add in the DHCP discovery
packets that go to the DHCP server.
Vendor ID Enter the Vendor Class Identifier, such as the type of the hardware or firmware.
option 61 Select this and enter any string that identifies the device.
IAID Enter the Identity Association Identifier (IAID) of the device, for example, the WAN connection
index number.
Table 36 Network Setting > Broadband > Add/Edit New WAN Interface (Routing Mode) (continued)
LABEL DESCRIPTION
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