Administrator Guide
10
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), ows, and routing
policies.
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 lter processor (FP) blocks. The total space allocated must equal 13 FP blocks.
NOTE: There are 16 FP blocks, but the system ow requires three blocks that cannot be reallocated.
The following table lists the default CAM allocation settings.
Table 8. 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
VMAN QoS (vman-qos) 0
VMAN Dual QoS (vman-dual-qos) 0
The ipv6acl and vman-dual-qos allocations must be entered as a factor of 2 (2, 4, 6, 8, 10). All other prole allocations can use
either even or odd numbered ranges.
NOTE: On the MXL 10/40GbE switch IO module, there can be only one odd number of Blocks in the CLI conguration;
the other Blocks must be in factors of 2. For example, a CLI conguration of 5+4+2+1+1 Blocks is not supported; a
conguration of 6+4+2+1 Blocks is supported.
You must save the new CAM settings to the startup-cong (write-mem or copy run start) then reload the system for the
new settings to take eect.
1. Select a cam-acl action.
Content Addressable Memory (CAM)
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