Concept Guide
• Re-congure 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-conguring the CAM usage threshold value.
Consider if the last CAM threshold was set to 90 percent and now you re-congure 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 congured CAM threshold
value.
Table 11. 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
CAM Optimization
When you enable this command, if a Policy Map containing classication rules (ACL and/or dscp/ ip-precedence rules) is applied to more
than one physical interface on the same port-pipe, only a single copy of the policy is written (only 1 FP entry is used).
When you disable this command, the system behaves as described in this chapter. However, enabling CAM optimization would apply a
single rate policy FP entry. If the input service policy maps applied to several ports are the same, rate policing is applied to all the ports as a
group and not individually.
Content Addressable Memory (CAM)
239