Reference Guide

Content Addressable Memory (CAM) | 273

• Change to the default profile if downgrading to and FTOS 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

The default CAM profile allocates a partition within the IPv4Flow region to store QoS service policies. If

the QoS CAM space is exceeded, messages similar to the ones in Message 5 are displayed.

If you exceed the QoS CAM space:

FTOS version 7.4.1 introduced the ability to view the actual CAM usage before applying a service-policy.

The command

test cam-usage service-policy provides this test framework, refer to Pre-calculating Available

QoS CAM Space.

Message 5 QoS CAM Region Exceeded

%EX2YD:12 %DIFFSERV-2-DSA_QOS_CAM_INSTALL_FAILED: Not enough space in L3

Cam(PolicyQos) for class 2 (Gi 12/20) entries on portpipe 1 for linecard 12

%EX2YD:12 %DIFFSERV-2-

DSA_QOS_CAM_INSTALL_FAILED: Not enough space in L3 Cam(PolicyQos) for class 5 (Gi 12/

22) entries on portpipe 1 for linecard 12

Step Task

Verify that you have configured a CAM profile that allocates 24K entries to the IPv4 system flow region. Refer to

View CAM Profiles.

2 Allocate more entries in the IPv4Flow region to QoS. Refer to Configure IPv4Flow Sub-partitions.

Note: For troubleshooting other CAM issues, refer to the E-Series Network Operations Guide.