Administrator Guide

Displaying CAM-ACL-Egress Settings
To display the current CAM ACL settings for each egress region, use the show cam-acl-egress command on the S5000.
The default egress CAM ACL allocation settings on an S5000 (stack unit 0) are in the following example.
Example of CAM-ACL-Egress Settings
Dell#show cam-acl-egress
-- Chassis Egress Cam ACL --
Current Settings(in block sizes)
L2Acl : 1
Ipv4Acl : 1
Ipv6Acl : 2
-- Stack unit 0 --
Current Settings(in block sizes)
L2Acl : 1
Ipv4Acl : 1
Ipv6Acl : 2
Dell#
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 classication 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 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.
236
Content Addressable Memory (CAM)