Administrator Guide

• The maximum number of members in an ACL VLAN group is determined by the type of switch and its hardware capabilities. This
scaling limit depends on the number of slices that are allocated for ACL CAM optimization. If one slice is allocated, the maximum
number of VLAN members is 256 for all ACL VLAN groups. If two slices are allocated, the maximum number of VLAN members is 512
for all ACL VLAN groups.
• The maximum number of VLAN groups that you can configure also depends on the hardware specifications of the switch. Each VLAN
group is mapped to a unique ID in the hardware. The maximum number of ACL VLAN groups supported is 31. Only a maximum of two
components (iSCSI counters, Open Flow, ACL optimization, and so on) can be allocated virtual flow processing slices at a time.
• Port ACL optimization is applicable only for ACLs that are applied without the VLAN range.
• If you enable the ACL VLAN group capability, you cannot view the statistical details of ACL rules per VLAN and per interface. You can
only view the counters per ACL only using the
show ip accounting access list command.
• Within a port, you can apply Layer 2 ACLs on a VLAN or a set of VLANs. In this case, CAM optimization is not applied.
• To enable optimization of CAM space for Layer 2 or Layer 3 ACLs that are applied to ports, the port number is removed as a qualifier
for ACL application on ports, and port bits are used. When you apply the same ACL to a set of ports, the port bitmap is set when the
ACL flow processor (FP) entry is added. When you remove the ACL from a port, the port bitmap is removed.
• If you do not attach an ACL to any of the ports, the FP entries are deleted. Similarly, when the same ACL is applied on a set of ports,
only one set of entries is installed in the FP, thereby saving CAM space. Enable optimization using the optimized option in the
ip
access-group command. This option is not valid for VLAN and link aggregation group (LAG) interfaces.
Configuring ACL VLAN Groups and Configuring FP
Blocks for VLAN Parameters
This section describes how to optimize CAM blocks by configuring ACL VLAN groups that you can attach to VLAN interfaces. It also
describes how to configure FP blocks for different VLAN operations.
Configuring ACL VLAN Groups
You can create an ACL VLAN group and attach the ACL with the VLAN members. The optimization is applicable only when you create an
ACL VLAN group.
1. Create an ACL VLAN group.
CONFIGURATION mode
acl-vlan-group {group name}
2. Add a description to the ACL VLAN group.
CONFIGURATION (conf-acl-vl-grp) mode
description description
3. Add VLAN member(s) to an ACL VLAN group.
CONFIGURATION (conf-acl-vl-grp) mode
member vlan {VLAN-range}
4. Display all the ACL VLAN groups or display a specific ACL VLAN group, identified by name.
CONFIGURATION (conf-acl-vl-grp) mode
show acl-vlan-group {group name | detail}
DellEMC#show acl-vlan-group detail
Group Name :
TestGroupSeventeenTwenty
Vlan Members :
100,200,300
Group Name :
CustomerNumberIdentificationEleven
Vlan Members :
2-10,99
Group Name :
HostGroup
Vlan Members :
94
Access Control List (ACL) VLAN Groups and Content Addressable Memory (CAM)