Users Guide

2. Configure an IP address for the interface, placing it in L3 mode in INTERFACE mode.
ip address ip-address
3. Apply an IP ACL filter to traffic entering or exiting an interface in INTERFACE mode.
ip access-group access-list-name {in | out}
Configure IP ACL
OS10(config)# interface ethernet 1/1/28
OS10(conf-if-eth1/1/28)# ip address 10.1.2.0/24
OS10(conf-if-eth1/1/28)# ip access-group abcd in
View ACL filters applied to interface
OS10# show ip access-lists in
Ingress IP access-list acl1
Active on interfaces :
ethernet1/1/28
seq 10 permit ip host 10.1.1.1 host 100.1.1.1 count (0 packets)
seq 20 deny ip host 20.1.1.1 host 200.1.1.1 count (0 packets)
seq 30 permit ip 10.1.2.0/24 100.1.2.0/24 count (0 packets)
seq 40 deny ip 20.1.2.0/24 200.1.2.0/24 count (0 packets)
seq 50 permit ip 10.0.3.0 255.0.255.0 any count (0 packets)
seq 60 deny ip 20.0.3.0 255.0.255.0 any count (0 packets)
seq 70 permit tcp any eq 1000 100.1.4.0/24 eq 1001 count (0 packets)
seq 80 deny tcp any eq 2100 200.1.4.0/24 eq 2200 count (0 packets)
seq 90 permit udp 10.1.5.0/28 eq 10000 any eq 10100 count (0 packets)
seq 100 deny tcp host 20.1.5.1 any rst psh count (0 packets)
seq 110 permit tcp any any fin syn rst psh ack urg count (0 packets)
seq 120 deny icmp 20.1.6.0/24 any fragment count (0 packets)
seq 130 permit 150 any any dscp 63 count (0 packets)
To view the number of packets matching the ACL, use the count option when creating ACL entries.
● Create an ACL that uses rules with the count option, see Assign sequence number to filter.
● Apply the ACL as an inbound or outbound ACL on an interface in CONFIGURATION mode, and view the number of packets
matching the ACL.
show ip access-list {in | out}
Ingress ACL filters
To create an ingress ACL filter, use the ip access-group command in EXEC mode. To configure ingress, use the in
keyword. Apply rules to the ACL with the ip access-list acl-name command. To view the access-list, use the show
access-lists command.
1. Apply an ingress access-list on the interface in INTERFACE mode.
ip access-group access-group-name in
2. Return to CONFIGURATION mode.
exit
3. Create the access-list in CONFIGURATION mode.
ip access-list access-list-name
4. Create the rules for the access-list in ACCESS-LIST mode.
permit ip host ip-address host ip-address count
Access Control Lists
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