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Table 13. Possible Scenarios of Syslog Warning (continued)
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
To optimize CAM utilization for QoS entries by minimizing the required policy-map CAM space, use the cam-optimization
command.
If you apply a policy map containing classification rules (ACL and/or DSCP/IP-precedence rules) to more than one physical
interface on the same port-pipe, only a single copy of the policy is written (only one FP entry is used).
To disable CAM optimization, use the no cam-optimization command. CAM allocation then behaves as described in CAM
Allocation.
Troubleshoot CAM Profiling
The following section describes CAM profiling troubleshooting.
QoS CAM Region Limitation
To store QoS service policies, the default CAM profile allocates a partition within the IPv4Flow region.
If the QoS CAM space is exceeded, a message similar to the following displays.
%EX2YD:12 %DIFFSERV-2-DSA_QOS_CAM_INSTALL_FAILED: Not enough space in L3
Cam(PolicyQos) for class 2 (Te 1/20) entries on portpipe 1 for linecard 1
%EX2YD:12 %DIFFSERV-2-
DSA_QOS_CAM_INSTALL_FAILED: Not enough space in L3 Cam(PolicyQos) for class 5 (Te 1/
22) entries on portpipe 1 for linecard 1
If you exceed the QoS CAM space, follow these steps.
1. Verify that you have configured a CAM profile that allocates 24 K entries to the IPv4 system flow region.
2. Allocate more entries in the IPv4Flow region to QoS.
Dell EMC Networking OS supports the ability to view the actual CAM usage before applying a service-policy. The test cam-
usage service-policy command provides this test framework. For more information, refer to Pre-Calculating Available
QoS CAM Space.
Content Addressable Memory (CAM)
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