Area Nssa - Allied Telesis AT-AR3050S Command Reference Manual

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.
area <area-id> nssa [default-information-originate <metric> |
Syntax
no-redistribution | no-summary | translator-role <role> ]
no area <area-id> nssa [default-information-originate |
no-redistribution | no-summary | translator-role ]
C613-50077-01 REV A
Parameter
<area-id>
default-information-
originate
<metric>
no-redistribution
no-summary
translator-role
Command Reference for AT-AR3050S
AlliedWare Plus™ Operating System - Version 5.4.5-2.x
Description
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>
<0-4294967295>
For example the values dotted decimal 0.0.1.2 and
decimal 258 would both define the same area ID.
Originate Type-7 default LSA into NSSA.
The external or internal metric. Specify the following:
metric<0-1677721
4>
metric-type<1-2> External metric type.
Do not redistribute external route into NSSA.
Do not inject inter-area route into NSSA.
Specify NSSA-ABR translator-role.
OSPF Area ID expressed in IPv4
address format A.B.C.D.
OSPF Area ID expressed as a
decimal number within the
range shown.
The metric value.
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