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interface interface slot/port
2. Configure an IP address for the interface, placing it in Layer-3 mode.
INTERFACE mode
ip address ip-address
3. Apply an IP ACL to traffic entering or exiting an interface.
INTERFACE mode
ip access-group access-list-name {in | out} [implicit-permit] [vlan vlan-range] [layer3]
NOTE: The number of entries allowed per ACL is hardware-dependent. For detailed specification about entries allowed
per ACL, refer to your line card documentation.
4. Apply rules to the new ACL.
INTERFACE mode
ip access-list [standard | extended] name
To view which IP ACL is applied to an interface, use the show config command in INTERFACE mode, or use the show
running-config command in EXEC mode.
Dell(conf-if)#show conf
!
interface GigabitEthernet 0/0
ip address 10.2.1.100 255.255.255.0
ip access-group nimule in
no shutdown
Dell(conf-if)#
To filter traffic on Telnet sessions, use only standard ACLs in the access-class command.
Counting ACL Hits
You can view the number of packets matching the ACL by using the count option when creating ACL entries.
You can configure either count (packets) or count (bytes). However, for an ACL with multiple rules, you can configure some
ACLs with count (packets) and others as count (bytes) at any given time.
1. Create an ACL that uses rules with the count option. Refer to Configuring a Standard IP ACL Filter.
2. Apply the ACL as an inbound or outbound ACL on an interface. Refer to Assign an IP ACL to an Interface.
3. View the number of packets matching the ACL.
EXEC Privilege mode
show ip accounting access-list
Configure Ingress ACLs
Ingress ACLs are applied to interfaces and to traffic entering the system.
These system-wide ACLs eliminate the need to apply ACLs onto each interface and achieves the same results. By localizing
target traffic, it is a simpler implementation.
To create an ingress ACL, use the ip access-group command in EXEC Privilege mode. The example shows applying the
ACL, rules to the newly created access group, and viewing the access list.
Example of Applying ACL Rules to Ingress Traffic and Viewing ACL Configuration
To specify ingress, use the in 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 tengig 0/0
Dell(conf-if-tengig0/0)#ip access-group abcd in
Dell(conf-if-tengig0/0)#show config
!
tengigethernet 0/0
no ip address
Access Control Lists (ACLs)
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