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Command Usage
• Setting the SPF holdtime to 0 means that there is no delay between
consecutive calculations.
• Using a low value allows the router to switch to a new path faster, but
uses more CPU processing time.
Example
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 must be in the form of an IP address.)
• 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
• This command can be used to advertise routes between areas.
• If routes are set to be advertised, the router will issue a Type 3 summary
LSA for each address range specified with this command.
• This router supports up 64 summary routes for area ranges.
Console(config-router)#timers spf 20
Console(config-router)#