Cisco Systems Logging Neighbors Going Up or Down, Configuring Filtering in OSPF

27-14
Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter27 Configuring OSPF
Customizing OSPF
Step3 Choose the OSPF process that you want to edit, then click Advanced.
The Edit OSPF Process Advanced Properties dialog box appears.
Step4 The Timers area allows you to modify the settings that are used to configure LSA pacing and SPF
calculation timers. In the Timers area, enter the following values:
•The SPF Delay Time, which specifies the time between when OSPF receives a topology change and
when the SPF calculation starts. Valid values range from 0 to 65535. The default value is 5.
•The SPF Hold Time, which specifies the hold time between consecutive SPF calculations.Valid
values range from 1 to 65534. The default value is 10.
•The LSA Group Pacing, which specifies the interval at which LSAs are collected into a group and
refreshed, check summed, or aged. Valid values range from 10 to 1800. The default value is 240.
Step5 Click OK.
Logging Neighbors Going Up or Down
By default, a syslog message is generated when an OSPF neighbor goes up or down.
To log neighbors going up or down, perform the following steps:
Step1 In the main ASDM window, choose Configuration > Device Setup > Routing > OSPF > Setup.
Step2 Click the Process Instances tab.
Step3 Click Advanced for the OSPF process that you want to edit.
The Edit OSPF Process Advanced Properties dialog box appears.
Step4 The Adjacency Changes area includes settings that define the adjacency changes that cause syslog
messages to be sent. In the Adjacency Changes area, enter the following values:
•Check the Log Adjacency Changes check box to cause the ASA to send a syslog message whenever
an OSPF neighbor goes up or down. This setting is checked by default.
•Check the Log Adjacency Changes Detail check box to cause the ASA to send a syslog message
whenever any state change occurs, not just when a neighbor goes up or down. This setting is
unchecked by default.
Step5 Click OK.
Note Logging must be enabled for the neighbor up or down messages to be sent.
Configuring Filtering in OSPF
The Filtering pane displays the ABR Type 3 LSA filters that have been configured for each OSPF
process.
ABR Type 3 LSA filters allow only specified prefixes to be sent from one area to another area and restrict
all other prefixes. This type of area filtering can be applied out of a specific OSPF area, into a specific
OSPF area, or into and out of the same OSPF areas at the same time.