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Chapter 26: Access Control List Commands
Access Control Lists (ACL) provide packet filtering for IPv4 frames (based on
address, protocol, Layer 4 protocol port number or TCP control code), IPv6 frames
(based on address, next header type, or flow label), or any frames (based on MAC
address or Ethernet type). To filter packets, first create an access list, add the
required rules, and then bind the list to a specific port. This section describes the
Access Control List commands.
Table 26-1 Access Control List Commands
Command Groups Function
IPv4 ACLs Configures ACLs based on IPv4 addresses, TCP/UDP port number,
protocol type, and TCP control code
IPv6 ACLs Configures ACLs based on IPv6 addresses, next header type, and flow
label
MAC ACLs Configures ACLs based on hardware addresses, packet format, and
Ethernet type
ACL Information Displays ACLs and associated rules; shows ACLs assigned to each port
Page
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26-7
26-12
26-16
IPv4 ACLs
The commands in this section configure ACLs based on IPv4 addresses, TCP/UDP
port number, protocol type, and TCP control code. To configure IPv4 ACLs, first
create an access list containing the required permit or deny rules, and then bind the
access list to one or more ports
Table 26-2 IPv4 ACL Commands
Command
access-list ip
permit, deny
permit, deny
show ip access-list
ip access-group
show ip access-group
Function Mode Page
Creates an IPv4 ACL and enters configuration mode for
standard or extended IPv4 ACLs
Filters packets matching a specified source IPv4 address
Filters packets meeting the specified criteria, including
source and destination IPv4 address, TCP/UDP port
number, protocol type, and TCP control code
Displays the rules for configured IPv4 ACLs
Adds a port to an IPv4 ACL
Shows port assignments for IPv4 ACLs
GC
IPv4-
STD-ACL
IPv4-
EXT-ACL
PE
26-2
26-2
26-3
26-5
IC 26-6
PE 26-6
26-1