Microsoft ES4612 User Manual
IP Routing Commands
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network area
This command defines an OSPF area and the interfaces that operate within this
area. Use the no form to disable OSPF for a specified interface.
area. Use the no form to disable OSPF for a specified interface.
Syntax
[no] network ip-address netmask area area-id
• ip-address - Address of the interfaces to add to the area.
• netmask - Network mask of the address range to add to the area.
• area-id - Area to which the specified address or range is assigned. An
• netmask - Network mask of the address range to add to the area.
• area-id - Area to which the specified address or range is assigned. An
OSPF area identifies a group of routers that share common routing
information. (The area ID must be in the form of an IP address.)
information. (The area ID must be in the form of an IP address.)
Command Mode
Router Configuration
Default Setting
Disabled
Command Usage
• An area ID uniquely defines an OSPF broadcast area. The area ID 0.0.0.0
indicates the OSPF backbone for an autonomous system. Each router must
be connected to the backbone via a direct connection or a virtual link.
be connected to the backbone via a direct connection or a virtual link.
• Set the area ID to the same value for all routers on a network segment using
the network mask to add one or more interfaces to an area.
• Be sure to include the primary address for an interface in the network area,
otherwise, OSPF will not operate for any secondary addresses covered by the
command.
command.
• An interface can only be assigned to a single area. If an address range is
overlapped in subsequent network area commands, the router will implement
the address range for the area specified in first command, and ignore the
overlapping ranges in subsequent commands. However, note that if a more
specific address range is removed from an area, the interface belonging to
that range may still remain active if a less specific address range covering that
area has been specified.
the address range for the area specified in first command, and ignore the
overlapping ranges in subsequent commands. However, note that if a more
specific address range is removed from an area, the interface belonging to
that range may still remain active if a less specific address range covering that
area has been specified.
• This router supports up to 64 OSPF router interfaces, and up to 16 total areas
(either normal transit areas, stubs, or NSSAs).
Example
This example creates the backbone 0.0.0.0 covering class B addresses 10.1.x.x,
and a normal transit area 10.2.9.0 covering the class C addresses 10.2.9.x.
This example creates the backbone 0.0.0.0 covering class B addresses 10.1.x.x,
and a normal transit area 10.2.9.0 covering the class C addresses 10.2.9.x.
Console(config-router)#network 10.1.0.0 255.255.0.0 area 0.0.0.0
Console(config-router)#network 10.2.9.0 255.255.255.0 area 10.1.0.0
Console(config-router)#
Console(config-router)#network 10.2.9.0 255.255.255.0 area 10.1.0.0
Console(config-router)#