RIP for IPX Route Filters

RIP for IPX filters are available from the Input Filters and Output Filters options in the RIP for IPX Configuration dialog box. RIP route filtering allows input and output filtering on each interface and is based on exceptions. You can either configure the Windows 2000 Router to:

Accept or announce all RIP for IPX routes except those disallowed by filters.

– Or –

Discard or not announce all RIP for IPX routes except those allowed by filters.

Figure 5.8 shows the Input Route Filters and the Route Filter dialog boxes.

Enlarge figure

Figure 5.8 RIP for IPX Route Filter Dialog Boxes

The following two sample RIP route filters provide examples of route filtering scenarios and the implementation of route filtering using the fields in the Route Filter dialog box. These examples are provided to illustrate how route filters are configured, not as a recommendation of specific route filtering for your network.

To set a RIP for IPX route input filter (Example)

Set the following input filter in order to discard all RIP for IPX routes except those starting with the hexadecimal digit A.

1. In the Input Route Filters dialog box, click Add.
2. In the Network number text box, type A0000000.
3. In the Network mask text box, type F0000000.
4. Click OK.
5. In the Input Route Filters dialog box, select the Deny routes except listed below option.
6. Click OK.

This filter uses the network mask to express a range of IPX network numbers from A0000000 to AFFFFFFF.

To set a RIP for IPX route output filter (Example)

Set the following output filter in order to announce all RIP for IPX routes except the specific IPX Network Number of BB0000099.

1. In the Output Route Filters dialog box, click Add.
2. In the Network number text box, type BB0000099.
3. In the Network mask text box, type FFFFFFFF.
4. Click OK.
5. In the Output Route Filters dialog box, select the Permit routes except listed below option.
6. Click OK.

This filter uses the network mask to express the single IPX network number BB000009.

Note

The network mask above is used only as an administrative convenience to express a range of IPX network numbers. This does not mean that the Windows 2000 Router is implementing a subnetting scheme for IPX internetworks. RIP for IPX internetworks use a flat network addressing space and do not support subnetting or route summarization.

Note

You cannot configure separate active filters for Permit routes except listed below and Deny routes except listed below.

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