Chapter 10 WAN
NBG6815 User’s Guide
73
IPv6 DNS Server
This is available only when you select IPv4 Only in the IPv4/IPv6 field and set IPv6 Tunneling to 6RD,
6in4 or 6to4.
First DNS Server
Second DNS Server
Third DNS Server
Specify the DNS server IPv6 address assigned by the ISP.
IPv6 Address
This section is NOT available when you select IPv4 Only in the IPv4/IPv6 field.
Obtain an IP
Address
Automatically(DHCP
)
Select this option if you want to obtain an IPv6 address from a DHCPv6 server.
•Select DUID-LL (Default) to have the NBG6815 use DUID-LL (DUID Based on
Link-layer Address) for identification when exchanging DHCPv6 messages.
•Select DUID-LLT to have the NBG6815 use DUID-LLT (DUID Based on Link-layer
Address Plus Time) for identification when exchanging DHCPv6 messages.
Static IP Address Select this option if you have a fixed IPv6 address assigned by your ISP.
IPv6 Address Enter the IPv6 address assigned by your ISP.
Prefix length Enter the address prefix length to specify how many most significant bits in an IPv6
address compose the network address.
IPv6 Default
Gateway
Enter the IPv6 address of the next-hop gateway. The gateway helps forward packets to
their destinations.
Link Local Only Select this option to use the link-local address which uniquely identifies a device on the
local network (the LAN).
IPv6 DNS Server
This is available only when you select Dual Stack or IPv6 Only in the IPv4/IPv6 field.
First DNS Server
Second DNS Server
Third DNS Server
Select Obtained From ISP to have the NBG6815 get the IPv6 DNS server addresses
from the ISP automatically.
Select User-Defined and enter the IPv6 DNS server address assigned by the ISP to
have the NBG6815 use the IPv6 DNS server addresses you configure manually.
Select None if you do not want to configure DNS servers. If you do not configure a DNS
server, you must know the IPv6 address of a computer in order to access it.
Multicast Setup
Multicast Setup Select IGMPv1/v2 to enable multicasting. This applies to traffic routed from the WAN
to the LAN.
Select None to disable this feature. This may cause incoming traffic to be dropped or
sent to all connected network devices.
Auto-Subnet Configuration
Enable Auto-IP-
Change Mode
Select this option to have the NBG6815 change its LAN IP address to 10.0.0.1 or
192.168.1.1 accordingly when the NBG6815 gets a dynamic WAN IP address in the
same subnet as the LAN IP address 192.168.1.1 or 10.0.0.1.
Select this option to have the NBG6815 change its LAN IP address to 10.0.0.1 or
192.168.1.1 accordingly when the NBG6815 gets a DNS server IP address in the same
subnet as the LAN IP address 192.168.1.1 or 10.0.0.1.
The NAT, DHCP server and firewall functions on the NBG6815 are still available in this
mode.
Apply Click Apply to save your changes back to the NBG6815.
Cancel Click Cancel to begin configuring this screen afresh.
Table 19 Network > WAN > Internet Connection: IPoE Encapsulation (continued)
LABEL DESCRIPTION
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