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Routing Commands
268
ProSafe M4100 and M7100 Managed Switches
no area range
The no form of this command deletes a specified area range or reverts an option to its
default.
Format
no area areaid range prefix netmask {summarylink |
nssaexternallink} [advertise | not-advertise] [cost]
Mode
area stub (OSPF)
This command creates a stub area for the specified area ID. A stub area is characterized by
the fact that AS External LSAs are not propagated into the area. Removing AS External LSAs
and Summary LSAs can significantly reduce the link state database of routers within the stub
area.
Format area <areaid> stub
Mode
Parameter Description
area-id The area identifier for the area whose networks are to be summarized.
prefix netmask The summary prefix to be advertised when the ABR computes a route to one or more
networks within this prefix in this area.
summarylink When this keyword is given, the area range is used when summarizing prefixes advertised in
type 3 summary LSAs.
nssaexternallink When this keyword is given, the area range is used when translating type 7 LSAs to type 5
LSAs.
advertise [Optional] When this keyword is given, the summary prefix is advertised when the area range
is active. This is the default.
not-advertise [Optional] When this keyword is given, neither the summary prefix nor the contained prefixes
are advertised when the area range is active. When the not-advertise option is given, any
static cost previously configured is removed from the system configuration.
cost [Optional] If an optional cost is given, OSPF sets the metric field in the summary LSA to the
configured value rather than setting the metric to the largest cost among the networks
covered by the area range. A static cost might only be configured if the area range is
configured to advertise the summary. The range is 0–16,777,215. If the cost is set to
16,777,215 for type 3 summarization, a type 3 summary LSA is not advertised, but contained
networks are suppressed. This behavior is equivalent to specifying the not-advertise option. If
the range is configured for type 7 to type 5 translation, a type 5 LSA is sent if the metric is set
to 16,777,215; however, other routers will not compute a route from a type 5 LSA with this
metric.
OSPFv2 Router Configuration
Router OSPF Config