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Command Reference
OSPFv3 Commands
3.5 area stub
Use this command to create a stub area or set its attributes. Use the
no
form of this command to
restore the default setting.
area
area-id
stub
[
no-summary
]
no area
area-id
stub
[
no-summary
]
Parameter
Description
Parameter
Description
area-id
ID of the stub area.
It can be an integer or an IPv6 prefix.
no-summary
This option applies only to the ABR in the stub area, indicating that
the ABR only advertises the type 3 LSA indicating the default route to
the stub area, not other type 3 LSAs.
Defaults
No stub area is defined by default.
Command
Mode
Routing process configuration mode
Usage Guide
If an area is at the end of an entire network, it can be designed as the stub area, in which all the
routers must execute the area stub command. If the area is designed as the stub area, it cannot learn
the AS external routing information (type 5 LSAs). In practical application, the external routing
information takes a large proportion of the link state database, so the devices in the stub area can
only learn very little routing information, thus reducing the system resources required for the running
of the OSPFv3 protocol.
By default, a type 3 LAS advertisement indicating default routing on the ABR in the stub area is
generated, then the devices in the stub area can get to the outside of the AS.
If a totally stub area needs to be configured, just select the keyword
no-summary
when executing the
area stub
command on the ABR.
Configuration
Examples
The following example enables the ABR in stub area 10 to advertise the default route to the stub area.
ipv6 router ospf 1
area 10 stub
area 10 stub no-summary
Related
Commands
Command
Description
area default-cost
Sets the cost of the default route in the stub
area.
Platform
Description
N/A
Содержание RG-S29 Series
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