Installation Guide of

xDSL/Cable SOHO Router

XRT-401


Appendix B. Routing

While the XRT-401 includes a standard routing table, this feature can be completely ignored if you do not have a router in your LAN.
If you DO have a router, it is necessary to configure BOTH the Router and the Routing table in the XRT-401 correctly, as described in the following sections.

 

B.1 Router Configuration

It is essential that all IP packets for devices not on the local LAN be passed to the XRT-401, so that they can be forwarded to the Internet. To achieve this, the Routers must be configured to use the XRT-401 as the Default Route or Default Gateway.

Default Route

B.1.1 Local Router

The local router is the Router installed on the same LAN segment as the XRT-401. This router requires that the Default Route is the XRT-401 itself. Typically, routers have a special entry for the Default Route. It should be configured as follows.

Destination IP Address

Normally 0.0.0.0, but check your router documentation.

Network Mask

Normally 0.0.0.0, but check your router documentation.

Gateway IP Address

The IP Address of the XRT-401.

Metric

1


B.1.2 Other Routers

Other routers must use the XRT-401's Local Router as the Default Route. The entries will be the same as the XRT-401's local router, with the exception of the Gateway IP Address.


B.2 Routing Example

Figure 1: Routing Example

For the LAN shown above, with 2 routers and 3 LAN segments, the required entries would be as follows.

B.2.1 For the XRT-401's Routing Table

The XRT-401 requires 2 entries as follows.

Entry 1 (Segment 1)

Destination IP Address

192.168.1.0

Network Mask

255.255.255.0
(Standard Class C)

Gateway IP Address

192.168.0.100 (XRT-401's local Router)

Entry 2 (Segment 2)

Destination IP Address

192.168.2.0

Network Mask

255.255.255.0

Gateway IP Address

192.168.0.100

 

B.2.2 For Router A's Default Route

Destination IP Address

0.0.0.0

Network Mask

0.0.0.0

Gateway IP Address

192.168.0.1
(XRT-401's IP Address)

 

B.2.3 For Router B's Default Route

Destination IP Address

0.0.0.0

Network Mask

0.0.0.0

Gateway IP Address

192.168.1.80
(XRT-401's local router)



B.3 Routing Screen

This screen is reached via the Routing option on the navigation bar. An example screen is shown below.

Figure 2 Routing Screen

B.3.1 Operation

To create a new entry:

  1. Click the Clear Form to clear the form.
  2. Enter the data as described below.
  3. Click the Add button.

To edit an existing entry:

  1. Select the entry from the drop-down list.
  2. Click and view the data for the selected entry.
  3. Edit the the data necessary.
  4. Click the Apply button.

Other Buttons

B.3.2 Routing Table Data

An entry in the routing table is required for each LAN segment on your Network, other than the segment to which this device is attached. The data for each entry is as follows.

Destination
IP Address

The network address of the remote LAN segment. For standard class "C" LANs, the network address is the first 3 fields of this Destination IP Address. The 4th (last) field can be left at 0.

Network Mask

The Network Mask used on the remote LAN segment. For class "C" networks, the standard Network Mask is 255.255.255.0

Gateway
IP Address

The IP Address of the Router on the LAN segment to which this device is attached.(NOT the router on the remote LAN segment.)

Metric

The number of routers which must be navigated to reach the remote LAN segment. The default value is 1.

Interface

Select the appropriate value from the drop-down list. The options are Internal (LAN) or External (WAN).


Top of This Page Appendix A Back to Content Appendix C  


Copyright© 2001, Planet Technology Corp.