Configuring Filtered Routes

Use the Filtered Routes window to add filters to networks or hosts.

You can add filters to IP destinations to prevent IP packets from being forwarded to networks/subnets, and prevent routing information from being disseminated concerning such destinations. IP packets destined for filtered network/subnets are discarded.

You must specify a filtered network/subnet together with its subnet mask. For example, to filter a subnet of a class B network, using the third byte for subnetting, the mask is 255.255.255.0.

Using the filter mechanism is more efficient than IP access controls, although not as flexible. Filters also affect the operation of the IP routing protocols, unlike access controls.

Procedure:

Step Action
1 Click ADD.  The Add/Modify window appears.
2 In the Add/Modify window, enter a network/subnet IP address into the IP Address field.
3 Enter a network/subnet IP address subnet mask into the Mask field.
4 Click Apply.

 

Field Descriptions

IP Address Network/subnet IP address  of the filtered route.
Mask Network/subnet IP address subnet mask of the filtered route.