Administrator Guide

Example of the show cam-usage Command
DellEMC#show cam-usage
Stackunit|Portpipe|Pipeline| CAM Partition | Total CAM | Used CAM |Available CAM
========|========|========|=================|=============|=============|==============
1 | 0 | 0 | IN-L2 ACL | 0 | 0 | 0
| | | IN-L3 ACL | 2304 | 1 | 2303
| | | IN-L3 ECMP GRP | 2048 | 0 | 2048
| | | IN-V6 ACL | 0 | 0 | 0
| | | IN-NLB ACL | 0 | 0 | 0
| | | IPMAC ACL | 0 | 0 | 0
| | | IN-V6-MIRRACL | 0 | 0 | 0
| | | IN-L3-MIRR ACL | 0 | 0 | 0
| | | OUT-L2 ACL | 206 | 12 | 194
| | | OUT-L3 ACL | 236 | 8 | 228
| | | OUT-V6 ACL | 236 | 3 | 233
| | | IN-L3 QOS | 0 | 0 | 0
| | | IN-L3 FIB | 155648 | 1029 | 154619
Configuring CAM Threshold and Silence Period
This section describes how to configure CAM threshold and silence period between CAM threshold syslog warnings.
The CAM threshold and silence period configuration is applicable only for Ingress L2, IPv4, IPv6 and Egress L2, IPv4, and IPv6
ACL CAM groups. For other ACL CAM regions, the CAM threshold and silence period is fixed and the values are 90 percent and
0 respectively.
You can assign CAM threshold value using cam-threshold command to receive syslog messages when the CAM usage
reaches the configured CAM threshold. The configured CAM threshold is a value specific to FP based on CAM features such as
Ingress and Egress L2, IPV4, IPV6. The system checks the CAM usage of the features with the set threshold to display a syslog
message, which contains the CAM region, slot/port-pipe and pipeline information. By default, syslog warning appears when the
CAM usage is 90 percent.
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.
232
Content Addressable Memory (CAM)