Not So Stubby Area (Nssa) - Siemens S223 User Manual

UMN:CLI
10.2.6.4
344

Not So Stubby Area (NSSA)

NSSA (Not So Stubby Area) is stub Area which can transmit the routing information to
Area by ASBR. On the other hand, Stub Area cannot transmit the routing information to
area. To configure NSSA, use the following command.
Command
area <0-4294967295> 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
•
no-summary
translator-role {candidate | never | always}
•
SURPASS hiD 6615 S223/S323 R1.5
Mode
Router Configures NSSA.
User Manual
Description
A50010-Y3-C150-2-7619