Multicast and Routing Guide K/KA/KB.15.15

and advertised
to the
backbone.
(Configure this
option where
an ABR for an
NSSA
advertises
external routes
that you do not
want
propagated to
the backbone.)
If
no-advertise
is not used in
the command,
the selected
routes learned
from type-7
LSAs in the
area are
summarized to
the backbone in
a type-5 LSA.
[cost 1-16777215] User configured
cost for an
NSSA summary
range. If cost is
not configured,
the ABR will use
the algorithm
defined in RFC
3101 to
compute the
cost and
metric-type of
the summarized
route. If cost is
specified, then
the range will
advertise the
specified cost
as the cost of
the summarized
route.
Assigning a cost
The cost parameter provides a way to define a fixed, user-assigned cost of an LSA type 3
summarized prefix.
152 Open Shortest Path First Protocol (OSPF)