Content Addressable Memory (CAM)
You can use content addressable memory (CAM) commands to configure the amount of memory allocated to CAM memory partitions.
NOTE:
Not all CAM commands are supported on all platforms. Be sure to note the platform when looking for a command.
WARNING:
If you are using these features for the first time, contact Dell Networking Technical Assistance Center (TAC) for
guidance.
CAM Profile Commands
The CAM profiling feature allows you to partition the CAM to best suit your application. For example:
•
Configure more Layer 2 forwarding information base (FIB) entries when the system is deployed as a switch.
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Configure more Layer 3 FIB entries when the system is deployed as a router.
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Configure more access control lists (ACLs) (when IPv6 is not employed).
•
Hash multi-protocol label switching (MPLS) packets based on source and destination IP addresses for link aggregation groups (LAGs).
•
Hash based on bidirectional flow for LAGs.
•
Optimize the virtual local area network (VLAN) ACL Group feature, which permits group VLANs for IP egress ACLs.
Important Points to Remember
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Dell Networking OS supports CAM allocations on the C-Series and S-Series.
•
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 route processor module [RPM]).
•
Dell Networking OS 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 the entire system when you use the CONFIGURATION mode commands. Save the running-
configuration to affect the change.
•
When budgeting your CAM allocations for ACLs and quality of service (QoS) configurations, remember that ACL and QoS rules might
consume more than one CAM entry depending on complexity. For example, transmission control protocol (TCP) and user datagram
protocol (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.
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Unified Forwarding Table Modes
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Content Addressable Memory (CAM)
