This feature extends the ability of an Area Border Router (ABR) that is running the Open Shortest Path First version 3 (OSPFv3)
protocol to filter type 3 link-state advertisements (LSAs) that are sent between different OSPFv3 areas. This feature allows
only packets with specified prefixes to be sent from one area to another area and restricts all packets with other prefixes.
This type of area filtering can be applied out of a specific OSPFv3 area, into a specific OSPFv3 area, or into and out of
the same OSPFv3 areas at the same time.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information,
see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module,
and to see a list of the releases in which each feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature
Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
OSPFv3 ABR Type 3 LSA Filtering
Only type 3 LSAs that originate from an ABR are filtered.
Information About OSPFv3 ABR Type 3 LSA Filtering
Area Filter Support
OSPFv3 area filters allow the filtering of inter-area prefix LSAs on the ABRs. The filter, based on IPv6 prefix lists, can
be applied in both directions. In the “in” direction, it filters out the LSAs coming from all other areas when sending the
inter-area prefix LSAs into the specified area. In the “out” direction, it filters out the inter-area prefix LSAs generated
for the specified area.
The Area Filter Support feature gives the administrator improved control of route distribution between OSPFv3 areas.
How to Configure OSPFv3 ABR Type 3 LSA Filtering
Configuring Area Filter Support for OSPFv3
SUMMARY STEPS
enable
configure terminal
router ospfv3 process-id
area area-idfilter-list prefix prefix-list-name {in |
out }
No new or modified standards are supported and support for existing standards has not been modified.
—
RFCs
RFC
Title
No new or modified RFCs are supported and support for existing RFCs has not been modified.
—
Technical Assistance
Description
Link
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use
these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products
and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.
Feature Information for
OSPFv3 ABR Type 3 LSA Filtering
The following table provides release information about the feature or features described in this module. This table lists
only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise,
subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco
Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1. Feature Information for
OSPFv3 ABR Type 3 LSA Filtering
Feature
Name
Releases
Feature
Information
OSPFv3 ABR
Type 3 LSA Filtering
15.3(1)S
15.2(1)E
The OSPFv3
ABR Type 3 LSA Filtering feature extends the ability of an ABR that is running
the OSPFv3 protocol to filter type 3 LSAs that are sent between different
OSPFv3 areas. This feature allows only packets with specified prefixes to be
sent from one area to another area and restricts all packets with other
prefixes. This type of area filtering can be applied out of a specific OSPFv3
area, into a specific OSPFv3 area, or into and out of the same OSPFv3 areas at
the same time.