Administrator Guide

4. Congure 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.
Conguring LSA Throttling Timers
Congured LSA timers replace the standard transmit and acceptance times for LSAs.
The LSA throttling timers are congured 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}
• start-interval: set the minimum interval between the initial sending and resending the same LSA. The range is from 0
to 600,000 milliseconds.
• hold-interval: set the next interval to send the same LSA. This interval is the time between sending the same LSA
after the start-interval has been attempted. The range is from 1 to 600,000 milliseconds.
• max-interval: set the maximum amount of time the system waits before sending the LSA. The range is from 1 to
600,000 milliseconds.
2. Specify the interval for LSA acceptance.
CONFIG-ROUTEROSPF- id mode
timers throttle lsa arrival arrival-time
• arrival-time: set the interval between receiving the same LSA repeatedly, to allow sucient time for the system to
accept the LSA. The range is from 0 to 600,000 milliseconds.
Enabling Passive Interfaces
A passive interface is one that does not send or receive routing information.
Enabling passive interface suppresses routing updates on an interface. Although the passive interface does not send or receive
routing updates, the network on that interface is still included in OSPF updates sent via other interfaces.
To suppress the interface’s participation on an OSPF interface, use the following command. This command stops the router from
sending updates on that interface.
• Specify whether all or some of the interfaces are passive.
CONFIG-ROUTEROSPF- id mode
550
Open Shortest Path First (OSPFv2 and OSPFv3)