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358 Nokia Network Voyager for IPSO 4.0 Reference Guide
To configure OSPF, use the following procedure.
Table 23 NSSA (Not So Stubby Area) Parameters
Parameter Description
Translator Role Specifies whether this NSSA border router will unconditionally translate
Type-7 LSAs into Type-5 LSAs. When role is Always, Type-7 LSAs are
translated into Type-5 LSAs regardless of the translator state of other NSSA
border routers. When role is Candidate, this router participates in the
translator election to determine if it will perform the translations duties. If this
NSSA router is not a border router, then this option has no effect.
Default: Candidate.
Translator Stability
Interval
Specifies how long in seconds this elected Type-7 translator will continue to
perform its translator duties once it has determined that its translator status
has been assumed by another NSSA border router. This field appears only if
an area is defined as an NSSA with translator role as Candidate. Default: 40
seconds.
Import Summary Routes Specifies if summary routes (summary link advertisements) are imported
into the stub area or NSSA. Each summary link advertisement describes a
route to a destination outside the area, yet still inside the AS (i.e. an inter-
area route). These include routes to networks and routes to AS boundary
routers.
Default: On.
Cost for Default Route Enter a cost associated with the default route to the NSSA.
Default Route Type Specifies the route type associated with the Type-7 default route for an
NSSA when routes from other protocols are redistributed into OSPF as
ASEs. If a redistributed route already has a route type, this type is
maintained. If summary routes are imported into an NSSA, only then a Type-
7 default route is generated (otherwise a Type-3 default route is generated).
This field appears only if an area is defined as an NSSA into which summary
routes are imported.
The route type can be either 1 or 2. A type 1 route is internal and its metric
can be used directly by OSPF for comparision. A type 2 route is external and
its metric cannot be used for comparision directly. Default: 1
Redistribution Specifies if both Type-5 and Type-7 LSAs or only Type-7 LSAs will be
originated by this router. This option will have effect only if this router is an
NSSA border router and this router is an AS border router. Default: On
Type 7 Address Ranges An NSSA border router that performs translation duties translates Type-7
LSAs to Type-5 LSAs. An NSSA border router can be configured with Type-
7 address ranges. Use these ranges to reduce the number of Type-5 LSAs.
Many separate Type-7 networks may fall into a single Type-7 address range.
These Type-7 networks are aggregated and a single Type-5 LSA is
advertised. By definition, a Type-7 address range consists of a prefix and a
mask length.
Note: To prevent a specific prefix from being advertised, select On in the
Restrict field next to the entry for that prefix.