Dell S4820T, Configuration Manual

Page: 143 / 1178

Counting ACL Hits
You can view the number of packets matching the ACL by using the
count
option when creating ACL
entries.
1. Create an ACL that uses rules with the count option. Refer to Configure a Standard IP ACL Filter .
2. Apply the ACL as an inbound or outbound ACL on an interface.
3.
show ip accounting access-list
EXEC Privilege mode
View the number of packets matching the ACL.
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 tengigabitethernet 1/1
Dell(conf-if-te1/1)# ip access-group abcd in
Dell(conf-if-te1/1)#show config
!
tengigabitethernet 1/1
no ip address
ip access-group abcd in
no shutdown
Dell(conf-if-te1/1)#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 1/1
seq 5 permit tcp any any
seq 10 deny icmp any any
seq 15 permit 1.1.1.2
Dell(conf)#interface tengigabitethernet 1/1/1
Dell(conf-if-te1/1/1)# ip access-group abcd in
Dell(conf-if-te1/1/1)#show config
!
tengogabitethernet 1/1/1
no ip address
Access Control Lists (ACLs)
143