Administrator Guide

Content Addressable Memory (CAM)

Content addressable memory (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.

Topics:

• CAM Allocation

• Test CAM Usage

• View CAM-ACL Settings

• CAM Optimization

CAM Allocation

Allocate space for IPV4 ACLs and quality of service (QoS) regions by using the cam-acl command in

CONFIGURATION mode.

The CAM space is allotted in filter 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

L3 ACL (ipv4acl) 2

L2 ACL(l2acl) 2

IPv6 L3 ACL (ipv6acl) 0

L3 QoS (ipv4qos) 2

L2 QoS (l2qos) 0

L2PT (l2pt) 0

MAC ACLs (ipmacacl) 0

ECFMACL (ecfmacl) 0

nlbclusteracl 2

FCOEACL (fcoeacl) 4

ISCSIOPTACL (iscsioptacl) 2

Content Addressable Memory (CAM) 265