To configure a stub area, use the following commands.
1. Review all areas after they were configured to determine which areas are NOT receiving type 5 LSAs.
EXEC Privilege mode
show ip ospf process-id database database-summary
2. Enter CONFIGURATION mode.
EXEC Privilege mode
configure
3. Enter ROUTER OSPF mode.
CONFIGURATION mode
router ospf process-id
Process ID is the ID assigned when configuring OSPFv2 globally.
4. Configure the area as a stub area.
CONFIG-ROUTER-OSPF-id mode
area area-id stub [no-summary]
Use the keywords no-summary to prevent transmission into the area of summary ASBR LSAs.
Area ID is the number or IP address assigned when creating the area.
Example of the show ip ospf database database-summary Command
To view which LSAs are transmitted, use the show ip ospf database process-id database-
summary command in EXEC Privilege mode.
Dell#show ip ospf 34 database database-summary
OSPF Router with ID (10.1.2.100) (Process ID 34)
Area ID Router Network S-Net S-ASBR Type-7 Subtotal
2.2.2.2 1 0 0 0 0 1
3.3.3.3 1 0 0 0 0 1
Dell#
To view information on areas, use the show ip ospf process-id command in EXEC Privilege mode.
Configuring LSA Throttling Timers
Configured LSA timers replace the standard transmit and acceptance times for LSAs.
The LSA throttling timers are configured in milliseconds, with the interval time increasing exponentially
until a maximum time has been reached. If the maximum time is reached, the system continues to
transmit at the max-interval. If the system is stable for twice the maximum interval time, the system
reverts to the start-interval timer and the cycle begins again.
1. Specify the interval times for all LSA transmissions.
CONFIG-ROUTEROSPF- id mode
timers throttle lsa all {start-interval | hold-interval | max-interval}
630 Open Shortest Path First (OSPFv2 and OSPFv3)