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The prefix lists are lists of routes that can be applied to one or more route policies. They contain a set of contiguous or non-contiguous routes. Prefix lists are referenced by name from within the routing policies.
You can create one or more IP prefix lists and apply that list to any IP route policy. Prior to the inception of the prefix list, two databases, the address-list and the net0lst, were used by all protocols for different types of policies. The prefix list combines these two databases. A prefix list with a 32 bit mask is equivalent to an address. A prefix list with a mask less than 32 bits can be used as a network. If you configure the MaskLenFrom field to be less than MaskLenUpto field, it can also be used as a range.
To set up or edit a route policy prefix list:
| The Policy dialog box opens with the Prefix List tab displayed. |
| The Policy, Insert Prefix List dialog box opens. |