The filter-policy import command configures IS-IS to filter the received routes to be added to the IP routing table.
The undo filter-policy import command disables IS-IS from filtering received routes.
By default, IS-IS does not filter received routes.
filter-policy { acl-number | acl-name acl-name-string | ip-prefix ip-prefix-name | route-policy route-policy-name | route-filter route-filter-name } import
undo filter-policy [ acl-number | acl-name acl-name-string | ip-prefix ip-prefix-name | route-policy route-policy-name | route-filter route-filter-name ] import
| Parameter | Description | Value |
|---|---|---|
| acl-number |
Specifies a basic ACL number. |
The value is an integer ranging from 2000 to 2999. |
| acl-name acl-name-string |
Specifies the name of a named basic ACL. |
The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter (a to z or A to Z, case sensitive). |
| ip-prefix ip-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 route-policy to filter routes based on tags and other protocol parameters. |
The name is a string of 1 to 200 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string. |
| route-filter route-filter-name |
Specifies the name of route filter policy. |
The value is a string of 1 to 200 case-sensitive characters, spaces not supported. If parameters are included in the referenced route-filter, specify values for them in the format of (var1, var2, ...var8) behind the route-filter name. A maximum of eight parameters can be specified, and each value ranges from 1 to 200 characters. |
Usage Scenario
IS-IS routing entries need to be added to an IP routing table for IP packet forwarding.
If an IS-IS routing table has routes destined for a specific network segment, but you do not want to add these routes to an IP routing table, run the filter-policy import command with specified parameters to add only the needed IS-IS routes to the IP routing table.Prerequisites
An IS-IS process has been created.
Configuration Impact
Running the filter-policy import command on a router does not affect LSP flooding and LSDB synchronization on the router, but affects the local IP routing table.
<HUAWEI> system-view [~HUAWEI] ip ip-prefix prefix-a index 10 permit 172.17.1.0 24 [*HUAWEI] route-policy policy1 permit node 10 [*HUAWEI-route-policy] if-match ip-prefix prefix-a [*HUAWEI-route-policy] quit [*HUAWEI] isis [*HUAWEI-isis-1] filter-policy route-policy policy1 import