Reference Guide

Applying Egress Layer 3 ACLs (Control-Plane)
By default, packets originated from the system are not filtered by egress ACLs.
For example, if you initiate a ping session from the system and apply an egress ACL to block this type of
traffic on the interface, the ACL does not affect that ping traffic. The Control Plane Egress Layer 3 ACL
feature enhances IP reachability debugging by implementing control-plane ACLs for CPU-generated and
CPU-forwarded traffic. Using permit rules with the
count option, you can track on a per-flow basis
whether CPU-generated and CPU-forwarded packets were transmitted successfully.
1. Apply Egress ACLs to IPv4 system traffic.
CONFIGURATION mode
ip control-plane [egress filter]
2. Apply Egress ACLs to IPv6 system traffic.
CONFIGURATION mode
ipv6 control-plane [egress filter]
3. Create a Layer 3 ACL using permit rules with the count option to describe the desired CPU traffic.
CONFIG-NACL mode
permit ip {source mask | any | host ip-address} {destination mask | any |
host ip-address} count
FTOS Behavior: Virtual router redundancy protocol (VRRP) hellos and internet group management
protocol (IGMP) packets are not affected when you enable egress ACL filtering for CPU traffic. Packets
sent by the CPU with the source address as the VRRP virtual IP address have the interface MAC address
instead of VRRP virtual MAC address.
Configuring UDF ACL
To configure a User Defined Field (UDF) ACL:
1. Enable UDF ACL feature on a switch.
CONFIGURATION mode
feature udf-acl
Dell(conf)#feature udf-acl
2. Change the default CAM allocation settings or reconfigure new CAM allocation settings and enable
IPV4 UDF.
CONFIGURATION 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 [nlbclusteracl number] ipv4pbr number }openflow number | fcoe
number} [ipv4udfenable] [vrfv4acl number]
Dell(conf)#cam-acl l2acl 1 ipv4acl 8 ipv6acl 2 ipv4qos 0 l2qos 2 l2pt 0
ipmacacl 0 vman-qos 0 ecfmacl 0 ipv4udfenable
3. View the currently configured CAM allocation.
Access Control Lists (ACLs)
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