Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

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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 FP blocks.

The following table lists the default CAM allocation settings.

NOTE There are 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 1. Default Cam Allocation SettingsDefault 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
fedgovacl	0

NOTE When you reconfigure CAM allocation, use the nlbclusteracl number command to change the number of NLB ARP entries. The range is from 0 to 2. The default value is 0. At the default value of 0, eight NLB ARP entries are available for use. This platform supports upto 1024 CAM entries. Select 1 to configure 1024 entries. Select 2 to configure 2048 entries. Even though you can perform CAM carving to allocate the maximum number of NLB entries, Dell EMC Networking recommends you to use a maximum of 64 NLB ARP entries.

The following additional CAM allocation settings are supported.

Table 2. Additional Default CAM Allocation Settings Additional Default CAM Allocation Settings
Additional CAM Allocation	Setting
FCoE ACL (fcoeacl)	0
ISCSI Opt ACL (iscsioptacl)	0

You must enter the ipv6acl and vman-dual-qos allocations as a factor of 2 (2, 4, 6, 8, 10). All other profile allocations can use either even or odd numbered ranges.

NOTE You can only have one odd number of blocks in the CLI configuration; the other blocks must be in factors of 2. For example, a CLI configuration of 5+4+2+1+1 blocks is not supported; a configuration of 6+4+2+1 blocks is supported.

For the new settings to take effect, you must save the new CAM settings to the startup-config (write-mem or copy run start) then reload the system for the new settings to take effect.

CAM Allocation for Egress

To allocate the space for egress L2, IPV4, and IPV6 ACL, use the cam-acl-egress command. The total number of available FP blocks is 4. Allocate at least one group of L2ACL and IPV4 ACL.

DellEMC(conf)#do show cam-acl-egress

-- Chassis Egress Cam ACL --
             Current Settings(in block sizes)
                   1 block = 256 entries
L2Acl        :         1
Ipv4Acl      :         1
Ipv6Acl      :         2

-- Stack unit 1 --
           Current Settings(in block sizes)
L2Acl        :         1
Ipv4Acl      :         1
Ipv6Acl      :         2

DellEMC(conf)#

Select a cam-acl action.
CONFIGURATION mode

cam-acl [default | l2acl]

NOTE Selecting default resets the CAM entries to the default settings. Select l2acl to allocate the desired space for all other regions.
Enter the number of FP blocks for each region.
EXEC Privilege mode

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 nlbcluster number ipv4pbr number openflow number | fcoe number iscsioptacl number [vrfv4acl number]

NOTE If you do not enter the allocation values for the CAM regions, the value is 0.
Execute write memory and verify that the new settings are written to the CAM on the next boot.
EXEC Privilege mode

show cam-acl
Reload the system.
EXEC Privilege mode

reload