TP-Link TD-8840T User Guide - Page 29
TD-8840T, Metric, Announced in RIP, Advanced Setup, Virtual Circuit, NAT Status, Number of IPs, 4.2.
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TD-8840T ADSL2+ Modem Router User Guide ¾ 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. ¾ Announced in RIP: This parameter determines if the ADSL router will include the route to this remote node in its RIP broadcasts. If set to Yes, the route to this remote node will be propagated to other hosts through RIP broadcasts. If No, this route is kept private and is not included in RIP broadcasts. 4.4.2 NAT Choose "Advanced Setup→NAT" menu, you can setup the NAT (Network Address Translation) function for the Router (shown in Figure 4-15). Figure 4-15 ¾ Virtual Circuit: Enter Virtual Circuit Index that you plan to setup for the NAT function. ¾ NAT Status: This field shows the current status of the NAT function for the current VC. You can go to the previous screen (shown in Figure 4-5) to activate the function. ¾ 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. 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. 4.4.2.1. DMZ Choose "Advanced Setup→NAT→DMZ" in Figure 4-15, you can configure the DMZ host in the next screen. A DMZ (demilitarized zone) is a host between a private local network and the outside public network. It allows outside users to access to a server that has company data directlly. Users of the public network outside the company can access to the DMZ host. 24