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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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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.

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