Specifications

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
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Chapter 2 Cisco IOS Commands
access-list (IP extended)
Defaults The default extended ACL is always terminated by an implicit deny statement for all packets.
Command Modes Global configuration
Command History
Usage Guidelines Plan your access conditions carefully. The ACL is always terminated by an implicit deny statement for
all packets.
You can use ACLs to control virtual terminal line access by controlling the transmission of packets on
an interface.
Extended ACLs support only the TCP and UDP protocols.
Use the show ip access-lists command to display the contents of IP ACLs.
Use the show access-lists command to display the contents of all ACLs.
Note For more information about configuring IP ACLs, refer to the “Configuring Network Security with
ACLs” chapter in the Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide for this
release.
operator port (Optional) Define a source or destination port.
The operator can be only eq (equal).
If operator is after the source IP address and wildcard, conditions match
when the source port matches the defined port.
If operator is after the destination IP address and wildcard, conditions
match when the destination port matches the defined port.
The port is a decimal number or name of a Transmission Control Protocol
(TCP) or User Datagram Protocol (UDP) port. The number can be from
0 to 65535.
Use TCP port names only for TCP traffic.
Use UDP port names only for UDP traffic.
dscp dscp-value (Optional) Define a Differentiated Services Code Point (DSCP) value to
classify traffic.
For the dscp-value, enter any of the 13 supported DSCP values (0, 8, 10,
16, 18, 24, 26, 32, 34, 40, 46, 48, and 56), or use the question mark (?) to
see a list of available values.
time-range
time-range-name
(Optional) For the time-range keyword, enter a meaningful name to
identify the time range. For a more detailed explanation of this keyword,
refer to the software configuration guide.
Release Modification
12.1(6)EA2 This command was first introduced.