area-type
Configures a particular OSPF area as
STUB, Totally STUB, NSSA or Totally NSSA. Areas can defined as:
- stub area - Is an area that does not
receive route advertisements external to the AS (autonomous system), and
routing from within the area is based entirely on a default route.
- totally-stub - Is an area that does
not allow summary routes and external routes. A default route is the only way to
route traffic outside of the area. When there is only one route out of the area,
fewer routing decisions are needed, lowering system resource utilization.
- non-stub - Is an area that imports
autonomous system external routes and forwards to other areas. However. it still
cannot receive external routes from other areas.
- nssa - A NSSA (Not-So-Stubby
Area) is an extension of a stub that allows the injection of limited external
routes into a stub area. If selecting NSSA, no external routes, except a default
route, enter the area.
- totally nssa - Is a NSSA using 3 and
4 summary routes are not flooded into this type of area. It is also possible to
declare an area both totally stubby and not-so-stubby, which means that the area will
receive only the default route from area 0.0.0.0, but can also contain an ASBR
(Autonomous System Boundary Router) that accepts external routing
information and injects it into the local area, and from the local area into area
0.0.0.0.
Supported in the following platforms:
- Access Points — AP410i/e, AP460i/e,
AP505i, AP510i/e, AP560i/h, AP7522, AP7532, AP7562, AP7612, AP7632, AP7662, AP8432,
AP8533
Syntax
area-type [nssa|stub]
area-type nssa {default-cost|no-summary|translate-always|translate-candidate|
translate-never}
area-type nssa {default-cost <0-16777215> {no-summary}|no-summary
{default-cost <0-16777215>}}
area-type nssa {translate-always|translate-candidate|translate-never}
{(default-cost <0-16777215>|no-summary)}
area-type stub {default-cost <0-16777215> {no-summary}|no-summary
{default-cost <0-16777215>}}
Parameters
area-type nssa {default-cost|no-summary|translate-always|translate-candidate|
translate-never}
| area-type |
Configures a particular OSPF area type as STUB, Totally STUB, NSSA or
Totally NSSA |
| nssa |
Configures the OSPF area as NSSA |
| stub |
Configures the OSPF area as STUB Stubby Area |
| default-cost <0-16777215> |
Specifies the default summary cost advertised, if the OSPF area is a
STUB or NSSA
- <0-16777215> –
Specify the default summary cost value from 0 - 16777215.
|
| no-summary |
Configures the OSPF area as totally STUB if the area-type is STUB or
totally NSSA if the area-type is NSSA |
| translate-always |
Always translates type-7 LSAs (Link State Advertisements) into
type-5 LSAs |
| translate-candidate |
Defines it as default behavior |
| translate-never |
Never translates type-7 LSAs into type-5 LSAs |
Examples
nx9500-6C8809(config-profile default-nx5500-router-ospf-area-0.0.0.1)#area-type stub default-cost 1
nx9500-6C8809(config-profile default-nx5500-router-ospf-area-0.0.0.1)#show context
area 0.0.0.1
area-type stub default-cost 1
nx9500-6C8809(config-profile default-nx5500-router-ospf-area-0.0.0.1)#
