Users Guide

View CAM Usage
View the amount of CAM space available, used, and remaining in each partition (including IPv4Flow and Layer 2 ACL sub- partitions) using
the
show cam-usage command in EXEC Privilege mode
The following output shows CAM blocks usage for Layer 2 and Layer 3 ACLs and other processes that use CAM space:
Example of the show cam-usage Command
Dell#show cam-usage
Stackunit|Portpipe| CAM Partition | Total CAM | Used CAM |Available CAM
========|========|=================|=============|=============|==============
0 0 | IN-L3 ACL | 512 | 1 | 511
| | IN-V6 ACL | 0 | 0 | 0
| | IN-L2 ACL | 768 | 0 | 768
| | OUT-L3 ACL | 158 | 5 | 153
| | IN-L3 ECMP GRP| 1024 | 0 | 1024
| | OUT-V6 ACL | 158 | 0 | 158
| | OUT-L2 ACL | 206 | 7 | 199
7 | 0 | IN-L3 ACL | 512 | 1 | 511
| | IN-V6 ACL | 0 | 0 | 0
| | IN-L2 ACL | 768 | 0 | 768
| | OUT-L3 ACL | 158 | 5 | 153
| | OUT-V6 ACL | 158 | 0 | 158
| | OUT-L2 ACL | 206 | 7 | 199
Codes: * - cam usage is above 90%.
Dell#
CAM Optimization
When you enable the CAM optimization, if a Policy Map containing classication 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 Proling
The following section describes CAM proling troubleshooting.
QoS CAM Region Limitation
To store QoS service policies, the default CAM prole 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 congured a CAM prole that allocates 24 K entries to the IPv4 system ow region.
2 Allocate more entries in the IPv4Flow region to QoS.
Dell 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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