System information

Command Line Interface
4-104
4
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.
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 4-38 Access Control List Commands
Command Groups Function Page
IPv4 ACLs Configures ACLs based on IPv4 addresses, TCP/UDP port number,
protocol type, and TCP control code
4-104
IPv6 ACLs Configures ACLs based on IPv6 addresses, next header type, and flow
label
4-110
MAC ACLs Configures ACLs based on hardware addresses, packet format, and
Ethernet type
4-115
ACL Information Displays ACLs and associated rules; shows ACLs assigned to each port 4-119
Table 4-39 IPv4 ACL Commands
Command Function Mode Page
access-list ip Creates an IPv4 ACL and enters configuration mode for
standard or extended IPv4 ACLs
GC 4-105
permit, deny Filters packets matching a specified source IPv4 address IPv4-
STD-ACL
4-105
permit, deny Filters packets meeting the specified criteria, including
source and destination IPv4 address, TCP/UDP port
number, protocol type, and TCP control code
IPv4-
EXT-ACL
4-106
show ip access-list Displays the rules for configured IPv4 ACLs PE 4-108
ip access-group Adds a port to an IPv4 ACL IC 4-109
show ip access-group Shows port assignments for IPv4 ACLs PE 4-109