C
HAPTER
45
| IP Routing Commands
Open Shortest Path First (OSPFv2)
– 1049 –
RELATED COMMANDS
area stub (1056)
area nssa (1054)
area range This command summarizes the routes advertised by an Area Border Router
(ABR). Use the no form to disable this function.
SYNTAX
[no] area area-id range ip-address netmask [advertise |
not-advertise]
area-id - Identifies an area for which the routes are summarized.
The area ID can be in the form of an IPv4 address or as a four octet
unsigned integer ranging from 0-4294967295.
ip-address - Base address for the routes to summarize.
netmask - Network mask for the summary route.
advertise - Advertises the specified address range.
not-advertise - The summary is not sent, and the routes remain
hidden from the rest of the network.
COMMAND MODE
Router Configuration
DEFAULT SETTING
Disabled
COMMAND USAGE
â—† This command can be used to summarize intra-area routes and
advertise this information to other areas through Area Border Routers
(ABRs).
â—† If the network addresses within an area are assigned in a contiguous
manner, the ABRs can advertise a summary route that covers all of the
individual networks within the area that fall into the specified range
using a single area range command.
â—† If routes are set to be advertised by this command, the router will issue
a Type 3 summary LSA for each address range specified by this
command.
â—† This router supports up 64 summary routes for area ranges.
EXAMPLE
This example creates a summary address for all area routes in the range of
10.2.x.x.
Console(config-router)#area 10.2.0.0 range 10.2.0.0 255.255.0.0 advertise
Console(config-router)#
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