DGS-6604 m area nssa
CLI Reference Guide
41
area nssa
Use this command to define an area as an NSSA (not-so-stubby) area. Use the
no nssa command to remove the NSSA designation.
Note: For OSPFv3 this command is not supported.
area AREA-ID nssa [no-redistribution] [default-information-originate [metric METRIC-VALUE]
[metric-type TYPE-VALUE] ] [no-summary]
no area AREA-ID nssa [no-redistribution] [default-information-originate] [no-summary]
Default • No NSSA area is configured.
• External routes will be redistributed to the NSSA area in type 7 unless
no-redistribute is specified.
• Type 7 default route will only be advertised by default when default-
information-originate is specified.
• If no-summary is specified, the summary route will not be advertised to
the NSSA area.
Command Mode Router configuration
Usage Guideline There are no external routes in an OSPF stub area, so it is not possible to
redistribute from another protocol into a stub area.
Syntax Description
AREA-ID Specifies the identifier of the area distinguished as the NSSA. The identifier can
be specified as either a decimal value or an IP address.
no-redistribution (Optional) Type 7 external routes will not be re-distributed to the NSSA. When
the user specifies to redistribute routes to the OSPF process, external routes will
always be redistributed to the normal area. This function only takes effect when
the router is an autonomous system boundary router (ASBR).
default-information-
originate
(Optional) For ASBR, a Type 7 default route will be generated into the NSSA
area when it exists in the redistributed routes. For ABR, when this option is
specified, the type-7 default route will always be generated into the NSSA area.
metric METRIC-
VALUE
(Optional) Specifies the metric for the default route. If not specified, the value will
be 1. The range for METRIC-VALUE is 0-16777214.
metric-type TYPE-
VALUE
(Optional) For OSPF, the external link type associated with the default route
advertised into the OSPF routing domain. It can be one of two values: Type 1
external route or Type 2 external route. If a metric-type is not specified, the
switch adopts a Type 2 external route.
no-summary (Optional) This function only take effect when the router is an ABR. Summary
routes are not advertised into the NSSA.
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