Users Guide

Example of Applying ACL Rules to Egress Traffic and Viewing ACL Configuration
To specify ingress, use the out keyword. Begin applying rules to the ACL with the ip access-list
extended abcd command. To view the access-list, use the show command.
Dell(conf)#interface gige 0/0
Dell(conf-if-gige0/0)#
ip access-group abcd out
Dell(conf-if-gige0/0)#show config
!
gigethernet 0/0
no ip address
ip access-group abcd out
no shutdown
Dell(conf-if-gige0/0)#end
Dell#configure terminal
Dell(conf)#
ip access-list extended abcd
Dell(config-ext-nacl)#permit tcp any any
Dell(config-ext-nacl)#deny icmp any any
Dell(config-ext-nacl)#permit 1.1.1.2
Dell(config-ext-nacl)#end
Dell#
show ip accounting access-list
!
Extended Ingress IP access list abcd on gigethernet 0/0
seq 5 permit tcp any any
seq 10 deny icmp any any
seq 15 permit 1.1.1.2
Applying Layer 3 Egress ACLs on Control-Plane Traffic
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
Dell Networking OS 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.
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Access Control Lists (ACLs)