Users Guide

Content Addressable Memory (CAM)

CAM is a type of memory that stores information in the form of a lookup table. On Dell Networking systems, CAM stores Layer 2 (L2) and

Layer 3 (L3) forwarding information, access-lists (ACLs), flows, and routing policies.

Topics:

• CAM Allocation

• Test CAM Usage

• View CAM-ACL Settings

• View CAM Usage

• CAM Optimization

• Troubleshoot CAM Profiling

CAM Allocation

CAM Allocation for Ingress

To allocate the space for regions such has L2 ingress ACL, IPV4 ingress ACL, IPV6 ingress ACL, IPV4 QoS, L2 QoS, PBR, VRF ACL, and

so forth, use the cam-acl command in CONFIGURATION mode.

The CAM space is allotted in field processor (FP) blocks. The total space allocated must equal 13 FP blocks.

The following table lists the default CAM allocation settings.

NOTE: There are 16 FP blocks, but the system flow requires three blocks that cannot be reallocated.

The following table displays the default CAM allocation settings. To display the default CAM allocation, enter the show cam-acl command.

Table 11. Default Cam Allocation Settings

CAM Allocation Setting

L2Acl 6

IPV4Acl 4

Ipv6Acl 0

Ipv4Qos 2

L2Qos 1

L2PT 0

IpMacAcl 0

VmanQos 0

VmanDualQos 0

EcfmAcl 0

nlbclusteracl 0

FcoeAcl 0

iscsiOptAcl 0

ipv4pbr 0

vrfv4Acl 0

Openflow 0

196 Content Addressable Memory (CAM)