KB.15.15

ManualsBrandsHP ManualsNetwork HardwareHP 5412R-92G-PoE+/2SFP+ (No PSU) v2 zl2 Switch

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backbone Assigns the routing switch to the backbone area and

automatically assigns an area ID of0.0.0.0 and an area type

of normal.

Using 0 or 0.0.0.0 with the above ospf-area-id option

achieves the same result. The backbone area is automatically

configured as a normal area type.

Example

To configure a backbone and a normal area with an ID of "1" (0.0.0.1) on a

routing switch:

HP Switch(ospf)# area backbone

HP Switch(ospf)# area 1

Configuring a stub or NSSA area

Syntax:

area ospf-area-id stub 0-16777215 [no-summary]

area ospf-area-id nssa 0-16777215 [no-summary] [metric-type[

type1 | type2 ]]

No area ospf-area-id

After using router ospf to globally enable OSPF and enter the global OSPF

context, execute this command to assign the routing switch to a stub area or NSSA.

(Does not apply to backbone and normal OSPF area ABRs.)

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

Default: No areas; Range: 1 to 16 areas (of all types)

ospf-area-id Same area ID as in “Configuring an OSPF backbone or

normal area” (page 142), except you cannot assign a

backbone area number ( 0 or 0.0.0.0) to a stub or

NSSA area.

[ stub | nssa ] Designates the area identified by ospf-area-id as a

stub area or NSSA.

0-16777215 If the routing switch is used as an ABR for the designated

area, assigns the cost of the default route (to the backbone)

that is injected into the area.

NOTE: If the routing switch is not an ABR for the stub

area or NSSA, the above cost setting is still required by

the CLI, but is not used.

In the default configuration, a routing switch acting as an ABR for a stub area or

NSSA injects type-3 summary routes into the area. For an NSSA, the routing switch

also injects a type-7 default route into the area.

[no-summary] Where the routing switch is an ABR for a

stub area or an NSSA, this option reduces

the amount of link-state advertisement (LSA)

traffic entering the area from the backbone

by replacing the injection of type-3 summary

routes with injection of a type-3 default

summary route.

For NSSAs, this command also disables

injection of the type-7 default external route

Assigning the routing switch to OSPF areas 143