C613-50170-01 Rev B
Command Reference for x510 Series
975
AlliedWare Plus™ Operating System - Version 5.4.7-1.x
OSPF C
OMMANDS
AREA
NSSA
area nssa
Overview
This command sets an area as a Not-So-Stubby-Area (NSSA). By default, no NSSA
area is defined.
Use this command to simplify administration if you are connecting a central site
using OSPF to a remote site that is using a different routing protocol. You can
extend OSPF to cover the remote connection by defining the area between the
central router and the remote router as an NSSA.
There are no external routes in an OSPF stub area, so you cannot redistribute from
another protocol into a stub area. A NSSA allows external routes to be flooded
within the area. These routes are then leaked into other areas. Although, the
external routes from other areas still do not enter the NSSA. You can either
configure an area to be a stub area or an NSSA, not both.
The
no
variant of this command removes this designation.
Syntax
area <
area-id
> nssa [default-information-originate <
metric
> |
no-redistribution | no-summary | translator-role <
role
> ]
no area <
area-id
> nssa [default-information-originate |
no-redistribution | no-summary | translator-role ]
Parameter
Description
<area-id>
The OSPF area that you are configuring as an NSSA. Use
one of the following formats: This can be entered in either
dotted decimal format or normal decimal format.
<ip-addr>
OSPF Area ID expressed in IPv4
address format A.B.C.D.
<0-4294967295>
OSPF Area ID expressed as a
decimal number within the
range shown.
For example the values dotted decimal 0.0.1.2 and
decimal 258 would both define the same area ID.
default-information-
originate
Originate Type-7 default LSA into NSSA.
<metric>
The external or internal metric. Specify the following:
metric
<0-1677721
4>
The metric value.
metric-type
<1-2>
External metric type.
no-redistribution
Do not redistribute external route into NSSA.
no-summary
Do not inject inter-area route into NSSA.
translator-role
Specify NSSA-ABR translator-role.
