Reference Guide

436 | Content Addressable Memory (CAM)
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Important Points to Remember
• CAM Profiles are available on FTOS versions 6.3.1.1 and later for the E-Series
TeraScale.
• FTOS versions 7.8.1.0 and later support CAM allocations on the C-Series and
S-Series.
• FTOS versions 8.3.12.0 and later support CAM allocations on the and
.
• All line cards within a single system must have the same CAM profile (including
CAM sub-region configurations); this profile must match the system CAM
profile (the profile on the primary RPM).
• FTOS automatically reconfigures the CAM profile on line cards and the
secondary RPM to match the system CAM profile by saving the correct profile
on the card and then rebooting it.
• The CAM configuration is applied to entire system when you use
CONFIGURATION mode commands. You must save the running-configuration
to affect the change.
• When budgeting your CAM allocations for ACLs and QoS configurations,
remember that ACL and QoS rules might consume more than one CAM entry
depending on complexity. For example, TCP and UDP rules with port range
options might require more than one CAM entry.
• After you install a secondary RPM, copy the running-configuration to the
startup-configuration so that the new RPM has the correct CAM profile.
• You MUST save your changes and reboot the system for CAM profiling or
allocations to take effect.
The CAM Profiling commands are:
• cam-acl (Configuration)
• cam-acl (EXEC Privilege)
• cam-optimization
• cam-profile (Config)
• show cam-acl
• show cam-acl-egress
• show cam-profile
• show cam-usage
• test cam-usage
cam-acl (Configuration)
c s
Select the default CAM allocation settings or reconfigure new CAM allocation for
Layer 2, IPv4 and IPv6 ACLs, Layer 2 and Layer 3 (IPv4) QoS, Layer 2 Protocol
Tunneling (L2PT), IP and MAC source address validation for DHCP, Ethernet
Connectivity Fault Management (CFM) ACLs, and Policy-based Routing (PBR).