Siemens S323, S223 Not So Stubby Area Nssa, Default-information-originate, No-redistribution

UMN:CLI	User Manual
	SURPASS hiD 6615 S223/S323 R1.5

10.2.6.4Not 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	Mode	Description
area <0-4294967295> 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-typeis 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-originatecommand 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-roleand it can be selected more than 2 options without order. default-information-originatehas metric <0-16777214> and metric-type<1-2> as an option, translator-rolemust 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}

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