Use this procedure to configure a prefix list to allow or deny specific route updates.
A prefix list policy specifies route prefixes to match. After a match occurs, the system uses the route.
The prefix list contains a set of contiguous or noncontiguous routes. Reference prefix lists by name from within a routing policy.
Use the data in the following table to use the Prefix List tab.
Name | Description |
---|---|
ID | Configures the list identifier. |
Prefix | Configures the IP address of the route. |
PrefixMaskLen | Configures the specified length of the prefix mask.
You must enter the full 32-bit mask to exact a full match of a specific IP address, for example, if you create a policy to match on the next hop. |
Name | Names a specified prefix list during the creation process or renames the specified prefix list. The name length can use from 1–64 characters. |
MaskLenFrom | Configures the lower bound of the mask length. The default is the mask length. Lower bound and higher bound mask lengths together can define a range of networks. |
MaskLenUpto | Configures the higher bound mask length. The default is the mask length. Lower bound and higher bound mask lengths together can define a range of networks. |