View Cam Usage; Cam Optimization; Troubleshoot Cam Profiling; Qos Cam Region Limitation - Dell S4048T Configuration Manual

View CAM Usage

View the amount of CAM space available, used, and remaining in each ACL partition using the show cam-
usage command from EXEC Privilege mode.
Example of the show cam-usage Command
Dell#show cam-usage
Stackunit|Portpipe| CAM Partition
========|========|=================|=============|=============|==============
1 0 | IN-L3 ACL
| |
| | IN-L2 ACL
| | OUT-L3 ACL
| | OUT-V6 ACL
| | OUT-L2 ACL
6 | 0 | IN-L3 ACL
| | IN-V6 ACL
| | IN-L2 ACL
| | OUT-L3 ACL
| | OUT-V6 ACL
| | OUT-L2 ACL
Codes: * - cam usage is above 90%.
Dell#

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.

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
| Total CAM
| 512
IN-V6 ACL |
| 768
| 158
| 158
| 206
| 512
|
|
| 158
| 158
| 206
| Used CAM |Available CAM
| 1 |
0 | 0 |
| 0 |
| 5 |
| 0 |
| 7 |
| 1 |
0 | 0 |
768 | 0 |
| 5 |
| 0 |
| 7 |
Content Addressable Memory (CAM)
511
0
768
153
158
199
511
0
768
153
158
199
279