Users Guide

User Congurable CAM Allocation

Allocate space for IPV6 ACLs 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 9 FP blocks. (There are 12 FP blocks, but

System Flow requires three blocks that cannot be reallocated.)

Enter the ipv6acl allocation as a factor of 3 (3, 6, 9). All other prole allocations can use either even or odd numbered ranges.

If you want to congure ACL's on VRF instances, you must allocate a CAM region using the vrfv4acl option in the cam-acl command.

Save the new CAM settings to the startup-cong (use write-mem or copy run start) then reload the system for the new settings

to take eect.

CAM Optimization

When you enable this command, if a policy map containing classication rules (ACL and/or dscp/ ip-precedence rules) is applied to more

than one physical interface on the same port-pipe, only a single copy of the policy is written (only one FP entry is used). When you disable

this command, the system behaves as described in this chapter.

Test CAM Usage

This command applies to both IPv4 and IPv6 CAM proles, but is best used when verifying QoS optimization for IPv6 ACLs.

To determine whether sucient ACL CAM space is available to enable a service-policy, use this command. To verify the actual CAM space

required, create a class map with all the required ACL rules, then execute the test cam-usage command in Privilege mode. The

following example shows the output when executing this command. The status column indicates whether you can enable the policy.

Example of the test cam-usage Command

Dell#test cam-usage service-policy input asd stack-unit 1 port-set 0

--------------------------------------------------------------------------

1| 1| IPv4Flow| 232| 0|Allowed

Dell#

Allocating ACL VLAN CAM

CAM optimization for ACL VLAN groups is not enabled by default. You must allocate blocks of ACL VLAN CAM to enable ACL CAM

optimization by using the cam-acl-vlan command.

By default, 0 blocks of CAM are allocated for VLAN services in the VLAN Content Aware Processor (VCAP), an application that modies

VLAN settings before forwarding packets on member interfaces. The cam-acl-vlan {vlanaclopt | vlanopenflow} command

allows you to allocate lter processor (FP) blocks of memory for ACL VLAN services:

Open Flow and ACL VLAN optimization.

You can congure CAM allocation for only two of these VLAN services at a time. You can allocate from 0 to 2 FP blocks for each VLAN

service.

To allocate the number of FP blocks for ACL VLAN optimization, enter the cam-acl-vlan vlanaclopt <0-2> command. After you

congure ACL VLAN CAM, reboot the switch to enable CAM allocation for ACL VLAN optimization.

To display the number of FP blocks currently allocated to dierent ACL VLAN services, enter the show cam-acl-vlan command.

Access Control Lists (ACLs)