filter (OSPFv3 area view)

Function

The filter export command filters outgoing Type-3 LSAs (Inter-Area-Prefix-LSAs) of the local area.

The undo filter export command restores the default setting.

The filter import command filters the incoming Type-3 LSAs (Inter-Area-Prefix-LSAs) of the local area.

The undo filter import command restores the default setting.

By default, outgoing Type-3 LSAs of the local area are not filtered.

By default, the incoming Type-3 LSAs are not filtered.

Format

filter { acl6-name acl6-name | ipv6-prefix ipv6-prefix-name | route-policy route-policy-name | route-filter route-filter-name } export

filter { acl6-name acl6-name | ipv6-prefix ipv6-prefix-name | route-policy route-policy-name | route-filter route-filter-name } import

filter acl6-number export

filter acl6-number import

undo filter [ acl6-name acl6-name | ipv6-prefix ipv6-prefix-name | route-policy route-policy-name | route-filter route-filter-name | acl6-number ] export

undo filter [ acl6-name acl6-name | ipv6-prefix ipv6-prefix-name | route-policy route-policy-name | route-filter route-filter-name | acl6-number ] import

Parameters

Parameter	Description	Value
acl6-name acl6-name	Specifies the name of a named basic ACL6.	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).
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 route-policy.	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 a route-filter. Only the routes that match the route-filter can be accepted.	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.
acl6-number	Specifies a basic ACL6 number.	The value is an integer ranging from 2000 to 2999.

Views

OSPFv3 area view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

The filter export command can be used to filter out the LSAs that do not need to be sent to neighbors to reduce the size of the LSDB and speed up network convergence.

The filter import command can be used to filter out the unneeded LSAs learned from neighbors to reduce the size of the LSDB and speed up network convergence.

Configuration Impact

After filtering conditions are set for the outgoing Type-3 LSAs to be advertised using the filter export command, only the outgoing Type-3 LSAs that match the filtering conditions can be advertised.

After filtering conditions are set for the incoming Type-3 LSAs using the filter import command, only the incoming Type-3 LSAs that match the filtering conditions can be accepted.

Precautions

The command can be configured only on an ABR.
For a named ACL, configure a filtering rule, the filtering rule takes effective only when the source address range is specified in source and the time period is specified in time-range.
To set filtering conditions for the incoming Type-3 LSAs, run the filter import command.
To set filtering conditions for the outgoing Type-3 LSAs to be advertised, run the filter export command.

Example

# Filter incoming Type-3 LSAs within the local area.

<HUAWEI> system-view
[~HUAWEI] ip ipv6-prefix my-prefix deny 2001:db8::1 64
[*HUAWEI] ospfv3 100
[*HUAWEI-ospfv3-100] area 1
[*HUAWEI-ospfv3-100-area-0.0.0.1] filter ipv6-prefix my-prefix import

# Configure OSPFv3 to filter the outgoing Type-3 LSAs.

<HUAWEI> system-view
[~HUAWEI] acl ipv6 2000
[*HUAWEI-acl6-basic-2000] quit
[*HUAWEI] ospfv3 100
[*HUAWEI-ospfv3-100] area 1
[*HUAWEI-ospfv3-100-area-0.0.0.1] filter 2000 export