Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.0P1 - Page 117
Applying Egress Layer 3 ACLs (Control-Plane
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To create an egress ACL, use the ip access-group command in EXEC Privilege mode. The example shows viewing the configuration, applying rules to the newly created access group, and viewing the access list. NOTE: VRF based ACL configurations are not supported on the egress traffic. 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 TenGigabitEthernet 1/1 Dell(conf-if-te-1/1)#ip access-group abcd out Dell(conf-if-te-1/1)#show config ! TenGigabitEthernet 1/1 no ip address ip access-group abcd out no shutdown Dell(conf-if-te-1/1)#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 tengigabitethernet 0/0 seq 5 permit tcp any any seq 10 deny icmp any any seq 15 permit 1.1.1.2 Dell#configure terminal Dell(conf)#interface te 1/2 Dell(conf-if-te-1/2)#ip vrf forwarding blue Dell(conf-if-te-1/2)#show config ! interface TenGigabitEthernet 1/2 ip vrf forwarding blue no ip address shutdown Dell(conf-if-te-1/2)# Dell(conf-if-te-1/2)# Dell(conf-if-te-1/2)#end Dell# 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. NOTE: The ip control-plane [egress filter] and the ipv6 control-plane [egress filter] commands are not supported. 1 Apply Egress ACLs to IPv4 system traffic. CONFIGURATION mode ip control-plane [egress filter] 2 Apply Egress ACLs to IPv6 system traffic. Access Control Lists (ACLs) 117
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