Implementing Acls On Dell Networking Os - Dell S4820T Configuration Manual

Hide thumbs Also See for S4820T:

Table of Contents

CAM Optimization

User Configurable CAM Allocation

Allocate space for IPV6 ACLs 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. (There are 16 FP blocks, but System Flow requires three blocks that cannot be reallocated.)

Enter the ipv6acl allocation as a factor of 2 (2, 4, 6, 8, 10). All other profile allocations can use either

even or odd numbered ranges.

If you want to configure 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-config (use write-mem or copy run start) then reload the

system for the new settings to take effect.

CAM Optimization

When you enable this command, if a policy map containing classification 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 profiles, but is best used when verifying QoS

optimization for IPv6 ACLs.

To determine whether sufficient 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

Dell#test cam-usage service-policy input TestPolicy linecard all

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

Implementing ACLs on Dell Networking OS

You can assign one IP ACL per interface with Dell Networking OS. If you do not assign an IP ACL to an

interface, it is not used by the software in any other capacity.

The number of entries allowed per ACL is hardware-dependent. For detailed specification on entries

allowed per ACL, refer to your line card documentation.

Access Control Lists (ACLs)