The filter import command filters the incoming Inter-Area-Prefix-LSAs of the local area.
The undo filter import command restores the default setting.
By default, the incoming Inter-Area-Prefix-LSAs cannot be filtered.
filter { acl6-number | ipv6-prefix ipv6-prefix-name | route-policy route-policy-name } import
undo filter [ acl6-number | ipv6-prefix ipv6-prefix-name | route-policy route-policy-name ] import
| Parameter | Description | Value |
|---|---|---|
| acl6-number | Specifies the number of a basic ACL. | The value is an integer that ranges from 2000 to 2999. |
| ipv6-prefix ipv6-prefix-name | Specifies the name of an IP prefix list. | The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string. |
| route-policy route-policy-name | Specifies the name of a routing policy. | The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string. |
Usage Scenario
The command can be used to filter out invalid LSAs sent to neighbors to reduce the size of the LSDB and speed up network convergence.
Configuration Impact
After filtering conditions are set for the incoming Inter-Area-Prefix-LSAs to be advertised using the filter import command, only the incoming Inter-Area-Prefix-LSAs that pass the filtering can be received.
Precautions
Creating an ACL6, IPv6 prefix list, or route-policy before it is referenced is recommended. If a nonexistent ACL6, IPv6 prefix list, or route-policy is referenced using the command, OSPFv3 receives all Type 3 LSAs.