Routing > OSPF > NSSA
Routing
316
RM GUI HiSecOS EAGLE20/30
Release
3.0
09/2015
Originate Default
Info
Activates/deactivates the creation of type 7 default LSAs.
The prerequisite for the creation of type 7 default LSAs is that the router is
an NSSA ABR or ASBR.
Possible values:
marked
The router creates type 7 default LSAs and sends then into the NSSA.
unmarked
(default setting)
The router suppresses type 7 default LSAs.
Default Metric Specifies the metric value advertised in the type 7 default LSA.
Possible values:
1..16777214
(default setting:
10
)
Default Metric
Type
Specifies the metric type advertised in the type 7 default LSA.
Possible values:
ospfMetric
The router advertises the metric as OSPF internal, which is the cost of
an intra-area route to the ABR.
comparable
The router advertises the metric as external type 1, which is the cost of
the OSPF internal metric plus external metric to the ASBR.
nonComparable
The router advertises the metric as external type 2, which is the cost of
the external metric to the ASBR.
Translator Role Specifies the ability of an NSSA border router to perform translation of type-
7 LSAs into type-5 LSAs.
NSSA Area Border Routers receive type-5 LSAs containing information
about external routes. The NSSA border routers block the type-5 LSAs from
entering into the NSSA. However, using type-7 LSAs the border routers
inform each other about external routes. The ABRs then translate the type-
7 LSAs to type-5 external LSAs and flood the information to the rest of the
OSPF network.
Possible values:
always
The router translates type-7 LSAs to type-5 LSAs.
When the router receives a type-5 LSAs from another router with a
router ID higher then its own, it flushes its type-5 LSAs.
candidate
(default setting)
When designated as the translator, the router translates type-7 LSAs to
type-5 LSAs.
To help prevent routing loops, OSPF performs a translator election.
When multiple candidates exist, OSPF elects the router with the higher
router ID as the translator.
Parameters Meaning
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