Reference Guide

11
Content Addressable Memory (CAM)
Content addressable memory (CAM) is supported on the S4820T platform.
CAM is a type of memory that stores information in the form of a lookup table. On Dell Networking
systems, CAM stores Layer 2 and Layer 3 forwarding information, access-lists (ACLs), flows, and routing
policies.
CAM Allocation
The user configurable CAM allocations feature is available on the S4820T platform.
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 etc on the S-Series by using 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.
NOTE: There are 16 FP blocks, but the system flow requires three blocks that cannot be reallocated.
The following table lists the default CAM allocation settings.
Table 10. 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
FcoeAcl 0
iscsiOptAcl 0
ipv4pbr 0
vrfv4Acl 0
Content Addressable Memory (CAM)
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