9
4) Bridge Mode
If you select this type of connection, the modem can be
configured to act as a bridging device between your LAN and
your ISP. Bridges are devices that enable two or more networks
to communicate as if they are two segments of the same
physical LAN.
Figure 4-8
Note: After you finish the Internet configuration, please click
SAVE to make the settings take effect.
4.3.2 LAN
Choose “Interface Setup->LAN” menu, and you will see the LAN
screen (shown in Figure 4-9). Please configure the parameters
for LAN ports according to the descriptions below.
Figure 4-9
- Router Local IP: These are the IP settings of the LAN
interface for the device. These settings may be referred to as
Private settings. You may change the LAN IP address if
needed. The LAN IP address is private to your internal
network and cannot be seen on the Internet.
• IP Address: Enter the Router’s local IP Address, then
you can access to the Web-based Utility via the IP
Address, the default value is 192.168.1.1.
• IP Subnet Mask: Enter the Router’s Subnet Mask, the
default value is 255.255.255.0.
• Dynamic Route: Select this option to specify the RIP
(Routing Information protocol) version for LAN interface,
including RIP1, RIP2-B and RIP2-M. RIP2-B and RIP2-
M are both sent in RIP2 format, the difference is that
RIP2-M using Multicast, while RIP2-B using Broadcast
format.
• Direction: Select this option to specify the RIP direction.
None is for disabling the RIP function. Both means the
ADSL Router will periodically send routing information
and accept routing information, and then incorporate
them into routing table. IN only means the ADLS router
will only accept but will not send RIP packet. OUT only
means the ADLS router will only send but will not accept
RIP packet.
• Multicast: Select IGMP version, or disable the function.
IGMP (Internet Group Multicast Protocol) is a session-
layer protocol used to establish membership in a
multicast group. The ADSL ATU-R supports both IGMP
version 1 (IGMP v1) and IGMP v2. Select “Disabled”
to disable it.
• GMP Snoop: Enable the IGMP Snoop function if you
need.
- DHCP Server: Select Enabled, then you will see the
screen below (shown in Figure 4-10). The Router will
work as a DHCP Server, it becomes the default gateway
for DHCP client connected to it. DHCP stands for
Dynamic Host Control Protocol. The DHCP Server gives
out IP addresses when a device is booting up and
request an IP address to be logged on to the network.
That device must be set as a DHCP client to obtain the
IP address automatically. By default, the DHCP Server is
enabled. The DHCP address pool contains the range of
the IP address that will automatically be assigned to the
clients on the network.
Figure 4-10
• Starting IP Address: Enter the starting IP address for
the DHCP server’s IP assignment. Because the
default IP address for the Router is 192.168.1.1, the
default Start IP Address is 192.168.1.2, and the Start
IP Address must be 192.168.1.2 or greater, but
smaller than 192.168.1.254.
• IP Pool Count: The max user pool size.
• Lease Time: The length of time for the IP lease.
After the dynamic IP address has expired, the user
will be automatically assigned a new dynamic IP
address. The default is 259200 seconds.
• DNS Relay: If you want to disable this feature, you
just need to set both Primary and secondary DNS IP
to 0.0.0.0. If you want to use DNS relay, you can
setup DNS server IP to 192.168.1.1 on their
Computer. If not, the device will perform as no DNS
relay.
• Primary DNS Server: Type in your preferred
DNS server.
• Secondary DNS Server: Type in your preferred
DNS server.
• Current Pool Summary: Click the button, you
can view the IP addresses that the DHCP Server
gives out.
Note: If Use Auto Discovered DNS Server Only is selected
in DNS Relay, this router will accept the first received DNS
assignment from one of the PPPoA, PPPoE or MER/DHCP
enabled PVC(s) during the connection establishment. If Use
User Discovered DNS Server Only is selected in DNS Relay,
it is necessary for you to enter the primary and optional
secondary DNS server IP addresses. After type in the
address, click SAVE button to save it and invoke it.
- DHCP Relay: Select Relay, then you will see the next
screen (shown in Figure 4-11), the Router will work as a
DHCP Relay. A DHCP relay is a computer that forwards
DHCP data between computers that request IP
addresses and the DHCP server that assigns the
addresses. Each of the device’s interfaces can be
configured as a DHCP relay. If it is enabled, the DHCP
requests from local PCs will forward to the DHCP server
runs on WAN side. To have this function working
properly, please run on router mode only, disable the
DHCP server on the LAN port, and make sure the
routing table has the correct routing entry.
