PC Concepts ADSL2+ user manual Routing, IP Route

that are available for both public and in-network accesses (such as a company's public Web server). Packets incoming on a DMZ interface -- whether from a LAN or external source -- are subject to a level of protection that is in between those for public and private interfaces.

Lower interface: EoA interfaces are defined in software, and then associated with lower-level software and hardware structures (at the lowest level, they are associated with a physical port

-the WAN port). This field should reflect an interface name defined in the next lower level of software over which the EoA interface will operate. This will be an ATM VC interface, such as aal5-0.

Config IP Address and Net Mask: The IP address and network mask you want to assign to the interface. If the interface will be used for bridging with your ISP and you will not be using the device as a router on your LAN, then you do not need to specify IP information. If you enable DHCP for this interface, then the Configured IP address will serve only as a request to the DHCP server. The actual address that is assigned by the ISP may differ if this address is not available.

Use DHCP: When enabled, this setting instructs the device to accept IP information assigned dynamically by your ISP's DHCP server. If the interface will be used for bridging with your ISP and you will not be routing data through it, leave this checkbox unselected.

Default Route: Indicates whether the ADSL/Ethernet router should use the IP address assigned to this interface, if any, as its default route for your LAN. This can be Enable or Disable.

Gateway Address: The external IP address that the ADSL/Ethernet router communicates with via the EoA interface to gain access to the Internet. This is typically an ISP server.

5.6Routing

5.6.1IP Route

IP routes can be created on the ADSL/Ethernet router to specify where it should send data received on a particular interface. Routes specify the IP address of the next device interface or Internet destination to forward data to, given the ultimate destination of the data.

A common type of route is a default gateway, which defines the IP address where all data is forwarded unless an IP route has been defined for the particular destination in question. Each time data is passed towards its destination from one Internet address to another, it is said to complete one hop.

62