KB.15.15

NOTE: Each ABR must be either directly connected to the backbone area (0) or be configured

with a virtual link to the backbone area through another ABR that is directly connected to the

backbone area.

Configuring an OSPFv3 backbone or normal area

Syntax:

area [ ospf3-area-id | backbone ] [ normal ]

no area [ ospf3-area-id | backbone ]

After using router ospf3 to globally enable OSPFv3 and enter the global

OSPF3 context, execute this command to assign the routing switch to a backbone

or other normal area.

The no form of the command removes the routing switch from the specified area.

Default: No areas. Range: 1 - 16 areas (of all types)

ospf-area-id

Specifies a normal area to which you are assigning the routing switch. You can

assign the routing switch to one or more areas, depending on the area in which

you want each configured VLAN or subnet to reside.

You can enter area IDs in either whole number or dotted decimal format. (The

routing switch automatically converts whole numbers to the dotted decimal

format.)

For example, if you enter an area-ID of 1, it appears in the switch's configuration

as 0.0.0.1, and an area-ID of 256 appears in the switch configuration as

0.0.1.0. Entering an area ID of 0 or 0.0.0.0 automatically joins the routing

switch to the backbone area.

The maximum area ID value is 255.255.255.254 (4,294,967,294).

backbone

Assigns the routing switch to the backbone area and automatically assigns an

area ID of 0.0.0.0 and an area type of normal. Using 0 or 0.0.0.0 with the

above ospf3-area-id option achieves the same result.

The backbone area is automatically configured as a "normal" area type.

normal

Applied by default if not specified in an area command. Required to convert

an existing NSSA or stub area to a normal area.

Configuring OSPFv3 on the routing switch 211