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You can also configure the silence period for the syslog message on the CAM usage. A syslog warning appears when the CAM
usage exceeds the configured CAM threshold. The silence period starts after the initial syslog warning. The syslog warning does
not appear until the silence period is active. By default, the silence period is 0 seconds.
Setting CAM Threshold and Silence Period
To configure the CAM threshold and silence period, use the following commands.
● Assign the CAM threshold percentage
CONFIGURATION mode
cam-threshold threshold {default | threshold-percent}
The range of threshold value is from 1 to 100. The default threshold value is 90 percent.
● Assign the silence period for syslog warning.
CONFIGURATION mode
cam-threshold threshold {default | threshold-percent} silence-period {default | silence-
period-value}
The range of silence period is from 0 to 65535. The default is 0 seconds.
NOTE:
If you delete a FP in a CAM region that is assigned with threshold, a syslog warning appears even during the silence period.
The system triggers syslog during the following events:
● Re-configure the CAM threshold
● Add or delete an ACL rule
Example of Syslog message on CAM usage
Following table shows few possible scenarios during which the syslog message appear on re-configuring the CAM usage
threshold value.
Consider if the last CAM threshold was set to 90 percent and now you re-configure the CAM threshold to 80. And, if the
current CAM usage is 85 percent, then the system displays the syslog message saying that the CAM usage is above the
configured CAM threshold value.
Table 14. Possible Scenarios of Syslog Warning
Old CAM
Threshold
New CAM
Threshold
Current CAM
Usage
Syslog
90 80 85
DellEMC(conf)#Nov 5
19:55:12 %S6000:0 %ACL_AGENT-4-
ACL_AGENT_CAM_USAGE_OVER_THE_THRESHOLD:
The Ipv4Acl cam region on stack-unit 0
Portpipe 0 Pipeline 0 is more than 80%
Full.
90 95 91
DellEMC(conf)#Nov 5
19:55:12 %S6000:0 %ACL_AGENT-4-
ACL_AGENT_CAM_USAGE_BELOW_THE_THRESHOLD:
The cam-usage of Ipv4Acl cam region on
stack-unit 0 Portpipe 0 Pipeline 0 is
below 95%.
98 100 100 No syslog
95 80 10 No syslog
92 90 89 No syslog
238 Content Addressable Memory (CAM)