Users Guide

Content Addressable Memory (CAM)

You can use content addressable memory (CAM) commands to congure 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 rst time, contact Dell EMC Networking Technical Assistance Center (TAC)

for guidance.

Topics:

• CAM Prole Commands

• Unied Forwarding Table Modes

CAM Prole Commands

The CAM proling feature allows you to partition the CAM to best suit your application. For example:

• Congure more Layer 2 forwarding information base (FIB) entries when the system is deployed as a switch.

• Congure more Layer 3 FIB entries when the system is deployed as a router.

• Congure 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 ow for LAGs.

• Optimize the virtual local area network (VLAN) ACL Group feature, which permits group VLANs for IP egress ACLs.

Important Points to Remember

• Dell EMC Networking OS supports CAM allocations on the S-Series.

• The CAM conguration is applied to the entire system when you use the CONFIGURATION mode commands. Save the running-

conguration to aect the change.

• When budgeting your CAM allocations for ACLs and quality of service (QoS) congurations, 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.

• You MUST save your changes and reboot the system for CAM proling or allocations to take eect.

cam-acl (Conguration)

Select the default CAM allocation settings or recongure a 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, OpenFlow, and Policy-based Routing (PBR).

Syntax

cam-acl {default | l2acl number ipv4acl number ipv6acl number ipv4qos number

l2qos number l2pt number ipmacacl number [vman-qos | vman-dual-qos number]

ecfmacl number [nlbclusteracl number] ipv4pbr number }openflow number | fcoe

528 Content Addressable Memory (CAM)