UMN:CLI
User Manual
V8102
660
This command is only available for ABR.
12.2.6.4
Not So Stubby Area (NSSA)
NSSA (Not So Stubby Area) is stub Area which can transmit the routing information to Ar-
ea by ASBR. On the other hand, Stub Area cannot transmit the routing information to area.
To configure NSSA, use the following command.
Command
Mode
Description
area
{<0-4294967295> |
A.B.C.D
}
nssa
Router
Configures NSSA.
The following options are configurable for NSSA:
•
default-information-originate
This option is configuration for allowing default path of Type-7 in NSSA. It means
routing path without routing information will use the interface which is allowed in de-
fault type-7 path.
metric
is for metric value,
metric-type
is for type of finding the path.
metric-type 1
uses internal path cost with external path cost as a cost,
metric type 2
always uses external cost value only.
•
no-redistribution
This option
is configuration in NSSA for restriction to retransmit the routing informa-
tion which is from outside.
•
no-summary
This option
is for restriction to exchange routing information between OSPF areas.
•
translator-role
NSSA-LSA (Link State Advertisement) has three types according to the way of
process type.
always
changes all NSSA-LSA into Type-5 LSA.
candidate
changes
NSSA-LSA into Type-5 LSA when it is translator.
never
does not change NSSA-LSA.
NSSA uses ASBR when it transmits Stub Area or other routing protocol Area into OSPF.
In this case, if other routing protocol has default path, use
default-information-originate
command to configure the all of default path is using the assigned ASBR
To configure
NSSA
with various features, use command with options.
area
<0-
4294967295>
NSSA
command has 4 options as
default-information-originate
,
no-
redistribution
,
no-summary
,
translator-role
and it can be selected more than 2 options
without order.
default-information-originate
has
metric
<0-16777214> and
metric-type
<1-2> as an option,
translator-role
must choose one of
candidate
,
never
,
always as an
options
.
The following is explaining options of command:
•
default-information-originate
or
default-information-originate metric
<0-16777214> or
default-information-originate metric-type
<1-2>
•
no-redistribution
!
