ADSL2/2+ Modem Router
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Chapter 4: Software Configuration
IP Subnet Mask: Enter the subnet mask for this destination.
Gateway IP Address: Enter the IP address of the gateway. The gateway is an immediate
neighbor of your Modem Router that will forward the packet to the destination. On the LAN, the
gateway must be a router on the same segment as your Router; over Internet, the gateway must
be the IP address of one of the remote nodes.
Metric: Metric represents the cost of transmission for routing purposes. IP Routing uses hop
count as the measurement of cost, with a minimum of 1 for directly connected networks. Enter a
number that approximates the cost for this link. The number need not to be precise, but it must
between 1 and 15. In practice, 2 or 3 is usually a good number.
Announced in RIP: It indicates whether this route rule is included in RIP broadcasts. If select Yes,
the route to this remote node will be propagated to other hosts through RIP broadcasts.
Otherwise, this route is kept private and is not included in RIP broadcasts.
NAT
Virtual Circuit: Enter Virtual Circuit Index that you plan to setup for the NAT function.
NAT Status: This field shows the current status of the NAT function for the current VC.
Number of IPs: This field is to specify how many IPs are provided by your ISP for current VC. It
can be single IP or multiple IPs. Only if we choose Multiple the menu of IP Address Mapping (for
Multiple IP Service) can appear.
We select Multiple to explain.
Note: For VCs with single IP, they share the same DMZ and Virtual Servers; for VCs with multiple
IPs, each VC can set DMZ and Virtual Servers. Furthermore, for VCs with multiple IPs, they can
define the Address Mapping rules; for VCs with single IP, since they have only one IP, there is no
need to individually define the Address Mapping rule.
