prefix-list Command Parameters
Parameter Description
list-name The name of the prefix list.
seq Keyword indicating that you want to provide a sequence number.
seq-number Specifies the sequence number for the prefix list entry in the range from 1 to
4,294,967,295.
permit Keyword indicating that the specified prefix list should be allowed.
deny Keyword indicating that the specified prefix list should be disallowed.
prefix Prefix address that is being identified.
len A network mask indicator that identifies the number of valid bits in the prefix. (For
instance, to specify a Class C address, the len value is 24.)
After configuring a prefix list, you apply that prefix list to an area by using the area
command. Filtering can be applied to traffic going into or coming out of an OSPF area or to
both the incoming and outgoing traffic for an area. The syntax for the area command is as
follows:
area area-id filter-list prefix {prefix-list-name in | out}
The parameters for the area command are shown in Table 11-12.