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Configuring OSPF
Command
Step 4
area area-id virtual-link router-id
[hello-interval seconds]
[retransmit-interval seconds] [trans]
[[authentication-key key] |
message-digest-key keyid md5 key]]
Step 5
default-information originate [always]
[metric metric-value] [metric-type
type-value] [route-map map-name]
Step 6
ip ospf name-lookup
Step 7
ip auto-cost reference-bandwidth ref-bw
Step 8
distance ospf {[inter-area dist1] [inter-area
dist2] [external dist3]}
Step 9
passive-interface type number
Step 10
timers throttle spf spf-delay spf-holdtime
spf-wait
Step 11
ospf log-adj-changes
Step 12
end
Step 13
show ip ospf [process-id [area-id]] database Display lists of information related to the OSPF database for a
Step 14
copy running-config startup-config
Changing LSA Group Pacing
The OSPF LSA group pacing feature allows the router to group OSPF LSAs and pace the refreshing,
check-summing, and aging functions for more efficient router use. This feature is enabled by default with
a 4-minute default pacing interval, and you will not usually need to modify this parameter. The optimum
group pacing interval is inversely proportional to the number of LSAs the router is refreshing,
check-summing, and aging. For example, if you have approximately 10,000 LSAs in the database,
decreasing the pacing interval would benefit you. If you have a very small database (40 to 100 LSAs),
increasing the pacing interval to 10 to 20 minutes might benefit you slightly.
Beginning in privileged EXEC mode, follow these steps to configure OSPF LSA pacing:
Command
Step 1
configure terminal
Step 2
router ospf process-id
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
32-30
Purpose
(Optional) Establish a virtual link and set its parameters. See the
"Configuring OSPF Interfaces" section on page 32-26
definitions and
Table 32-5 on page 32-24
(Optional) Force the ASBR to generate a default route into the OSPF
routing domain. Parameters are all optional.
(Optional) Configure DNS name lookup. The default is disabled.
(Optional) Specify an address range for which a single route will be
advertised. Use this command only with area border routers.
(Optional) Change the OSPF distance values. The default distance
for each type of route is 110. The range is 1 to 255.
(Optional) Suppress the sending of hello packets through the
specified interface.
(Optional) Configure route calculation timers.
spf-delay—Delay between receiving a change to SPF
•
calculation. The range is from 1 to 600000. miliseconds.
spf-holdtime—Delay between first and second SPF calculation.
•
The range is form 1 to 600000 in milliseconds.
•
spf-wait—Maximum wait time in milliseconds for SPF
calculations. The range is from 1 to 600000 in milliseconds.
(Optional) Send syslog message when a neighbor state changes.
Return to privileged EXEC mode.
specific router. For some of the keyword options, see the
OSPF" section on page
32-31.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enable OSPF routing, and enter router configuration mode.
Chapter 32
Configuring IP Unicast Routing
for parameter
for virtual link defaults.
"Monitoring
78-17058-01
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Troubleshooting
