Administrator Guide

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
CAM Optimization
When you enable the CAM optimization, if a Policy Map containing classification 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 one FP entry is used). When
you disable this command, the system behaves as described in this chapter.
Troubleshoot CAM Profiling
The following section describes CAM profiling troubleshooting.
CAM Profile Mismatches
The CAM profile on all cards must match the system profile. In most cases, the system corrects mismatches by copying the correct profile
to the card, and rebooting the card. If three resets do not bring up the card, the system displays an error message. In this case, manually
adjust the CAM configuration on the card to match the system configuration.
To prevent mismatches, Dell EMC Networking recommends the following:
• Use the eg-default CAM profile in a chassis that has only EG Series line cards. If this profile is used in a chassis with non-EG line cards,
the non-EG line cards enter a problem state.
• Before moving a card to a new chassis, change the CAM profile on a card to match the new system profile.
• After installing a secondary RPM into a chassis, copy the running-configuration to the startup-configuration.
• Change to the default profile if downgrading to a Dell EMC Networking OS version earlier than 6.3.1.1.
• Use the CONFIGURATION mode commands so that the profile is change throughout the system.
• Use the EXEC Privilege mode commands to match the profile of a component to the profile of the target system.
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 (Gi 1/20) entries on portpipe 1 for stackunit 1
%EX2YD:12 %DIFFSERV-2-
DSA_QOS_CAM_INSTALL_FAILED: Not enough space in L3 Cam(PolicyQos) for class 5
(Gi 1/22) entries on portpipe 1 for stackunit 1
If you exceed the QoS CAM space, follow these steps.
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Content Addressable Memory (CAM)