Users Guide

• Destination IP address

• Source TCP port number

• Destination TCP port number

• Source UDP port number

• Destination UDP port number

For more information about ACL options, refer to the Dell Networking OS Command Reference Guide.

For extended ACL, TCP, and UDP filters, you can match criteria on specific or ranges of TCP or UDP ports. For extended ACL TCP filters,

you can also match criteria on established TCP sessions.

When creating an access list, the sequence of the filters is important. You have a choice of assigning sequence numbers to the filters as

you enter them, or the Dell Networking Operating System (OS) assigns numbers in the order the filters are created. The sequence

numbers are listed in the display output of the show config and show ip accounting access-list commands.

Ingress and egress Hot Lock ACLs allow you to append or delete new rules into an existing ACL (already written into CAM) without

disrupting traffic flow. Existing entries in the CAM are shuffled to accommodate the new entries. Hot lock ACLs are enabled by default

and support both standard and extended ACLs and on all platforms.

NOTE: Hot lock ACLs are supported for Ingress ACLs only.

CAM Usage

The following section describes CAM allocation and CAM optimization.

• User Configurable CAM Allocation

• 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 Command

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

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

1| 1| IPv4Flow| 232| 0|Allowed

Dell#

Access Control Lists (ACLs)