Configuring IPv6 OSPFv3 Areas in Gaia Clish

Important - In a ClusterClosed Two or more Security Gateways that work together in a redundant configuration - High Availability, or Load Sharing., you must configure all the Cluster Members in the same way.

For description of OSPFv3 Areas, see IPv6 OSPFv3 Types of Areas.

The configuration is applicable to OSPFv3 Multiple Instances (see Configuring IPv6 OSPFv3 Multiple Instances).

An OSPFv3 area defines a group of routers, which run OSPFv3 and have complete topology information for the given area.

An OSPFv3 area uses an Area Border Router (ABR) to exchange routing information with other areas via the backbone area.

Routes for a given area are summarized into the backbone area.

The backbone area then redistributes this summary information to other areas.

By definition, an ABR has interfaces to more than one area.

One of those areas must be either the backbone or an OSPFv3 Virtual Link to the backbone.

OSPFv3 forces a hub and spoke area topology, with the backbone area always being the hub.

set ipv6 ospf3 instance {<1-65535> | default} area <OSPFv3 Area ID>

      {off | on}

      range <IPv6 Address>/<Mask Length>

            {off | on}

            restrict {off | on}

      stub

            default-cost {<1-16777215> | default}

            {off | on}

            summary {off | on}

      stub-network <IPv6 Address>/<Mask Length>

            {off | on}

            stub-network-cost {<1-65535> | default}

Parameter

Description

set ospf [instance {<1-65535> | default}]
area <OSPFv3 Area ID>

Specifies an OSPFv3 Area ID (for this OSPFv3 Instance).

>

Best Practice - Enter the area ID as a dotted quad. The area ID 0.0.0.0 is reserved for the backbone.

Range:

  • backbone

    (By default, the backbone area is enabled. You can disable the backbone area if the system does not have interfaces on the backbone area.)

  • integer between 0 and 4294967295

  • dotted quad form (example: 0.0.0.1 for area id 1)

Default: none

set ipv6 ospf3 [instance {<1-65535> | default}]
area <OSPFv3 Area>
{off | on}

Removes (off) or creates (on) the area and all related configuration.

set ipv6 ospf3 [instance {<1-65535> | default}]
area <OSPFv3 Area>
range <IPv6 Address>/<Mask Length>

Configures an OSPFv3 address range for this area.

An IPv6 address range is defined by a prefix and a mask length in CIDR notation format (for example, FC00:1::0/64).

An area can be configured with any number of address ranges.

These ranges are used to reduce the number of routing entries that an area will emit into the backbone area (and hence all areas).

If a given prefix aggregates a number of more specific prefixes within an area, then an address range can be configured and will be the only prefix advertised into the backbone.

Important - Pay attention when you configure an address range that includes addresses, which are not contained within the area. If a range is marked as restricted, then no advertisement is injected into the backbone.

range <IPv6 Address>/<Mask Length> {off | on | restrict {off | on}}

Removes (off), adds (on), or restricts (restrict) the OSPFv3 address range in this area.

  • off - Removes the given address range from the list of ranges to be advertised into the backbone area.

  • on - Configures the given address range to be advertised into the backbone area.

  • restrict - Blocks (off) or allows (on) the given address range from being advertised into the backbone area.

Range: off, on, or restrict

Default: none

set ipv6 ospf3 [instance {<1-65535> | default}]
area <OSPFv3 Area> stub

Configures this area as a Stub Area.

Stub areas do not allow Type 5 LSAs to be propagated into or throughout the area and instead depend on default routing for external destinations.

You can configure an area as a Stub Area to reduce the number of entries in the routing table.

Routes external to the OSPFv3 domain are not added to the routing table.

Note - The backbone area cannot be a stub area.

stub default-cost {<1-16777215> | default}

Configures the routing cost associated with the default route for this area.

The higher the cost, the less preferred the route.

Range: 1-16777215, or default

Default: 1

stub {off | on}

Disables (off) or enables (on) this stub area:

  • off - Reconfigures the given area to not be a Stub Area.

  • on - Configures the given area to be a Stub Area.

Range: off, or on

Default: off

stub summary {off | on}

Disables (off) or enables (on) reception of summary LSAs into the area.

A Totally-Stubby Area does not have Type 4 or Type 5 LSAs.

It has only a single Type 3 LSA, which describes a default route.

  • When this option is disabled, the area is Totally-Stubby.

  • When this option is enabled, the area is Not Totally-Stubby.

Range: off, or on

Default: on

set ipv6 ospf3 [instance {<1-65535> | default}]
area <OSPFv3 Area>
stub-network <IPv6 Address>/<Mask Length>

Configures a Stub Network for this area.

An IPv6 address range is defined by a prefix and a mask length in CIDR notation format (for example, FC00:1::0/64).

OSPFv3 can advertise routes of networks, which are not running OSPFv3 by using a stub network.

The advertised routes appear as OSPFv3 internal routes, and can be filtered for export at area borders using OSPFv3 area ranges.

Any advertised network prefix must be directly connected to the router, where the stub network is configured.

Meaning, one of the router's interface addresses must be within the network to be included in the router LSA.

For OSPFv2, IPv4 Stub hosts may be configured by using a mask length of 32.

For OSPFv3, IPv6 Stub hosts may be configured by using a mask length of 128.

This feature also supports advertising a network that can be activated by the local address of a point-to-point interface. To advertise reachability to such an network, you must configure an IP address for the network along with a non-zero cost.

stub-network <IPv6 Address>/<Mask Length> {off | on}

Controls the stub network for this area:

  • off - Removes the given stub network from the given area.

  • on - Adds the given stub network to the given area.

Range: off, or on

Default: none

stub-network <IPv6 Address>/<Mask Length>
stub-network-cost {<1-65535> | default}

Configures the cost associated with the stub network as reached through this router.

The higher the cost, the less preferred the route.

Range: 1-65535, or default

Default: 1