filter-policy import

Use filter-policy import to configure IS-IS to filter routes calculated using received LSPs.

Use undo filter-policy import to restore the default.

Syntax

filter-policy { ipv4-acl-number | prefix-list prefix-list-name | route-policy route-policy-name } import

undo filter-policy import

Default

IS-IS does not filter routes calculated using received LSPs.

Views

IS-IS IPv4 unicast address family view

Predefined user roles

network-admin

Parameters

ipv4-acl-number: Specifies an ACL by its number in the range of 2000 to 3999 to filter routes calculated using received LSPs.

prefix-list prefix-list-name: Specifies an IPv4 prefix list by its name, a case-sensitive string of 1 to 63 characters, to filter routes calculated using received LSPs by destination address.

route-policy route-policy-name: Specifies a routing policy by its name, a case-sensitive string of 1 to 63 characters, to filter received routes.

Usage guidelines

To use an advanced ACL (with a number from 3000 to 3999) in the command, configure the ACL using one of the following methods:

• To deny/permit a route with the specified destination, use the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard command.

• To deny/permit a route with the specified destination and mask, use the rule [ rule-id ] { deny | permit } ip source sour-addr sour-wildcard destination dest-addr dest-wildcard command.

The source keyword specifies the destination address of a route and the destination keyword specifies the subnet mask of the route. For the configuration to take effect, specify a contiguous subnet mask.

Examples

# Use basic ACL 2000 to filter routes calculated using received LSPs.

<Sysname> system-view
[Sysname] acl basic 2000
[Sysname-acl-ipv4-basic-2000] rule deny source 192.168.10.0 0.0.0.255
[Sysname-acl-ipv4-basic-2000] quit
[Sysname] isis 1
[Sysname-isis-1] address-family ipv4
[Sysname-isis-1-ipv4] filter-policy 2000 import

# Use advanced ACL 3000 to filter routes calculated using received LSPs and install only route 113.0.0.0/16 to the IP routing table.

<Sysname> system-view
[Sysname] acl advanced 3000
[Sysname-acl-ipv4-adv-3000] rule 10 permit ip source 113.0.0.0 0 destination 255.255.0.0 0
[Sysname-acl-ipv4-adv-3000] rule 100 deny ip
[Sysname-acl-ipv4-adv-3000] quit
[Sysname] isis 1
[Sysname-isis 1] address-family ipv4
[Sysname-isis-1-ipv4] filter-policy 3000 import

Related commands

display ip routing-table