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Cisco Catalyst 4500 Series Command Reference Guide

Cisco Catalyst 4500 Series
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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
OL-27596 -01
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
duplex
duplex
To configure the duplex operation on an interface, use the duplex command. To return to the default
setting, use the no form of this command.
duplex {auto | full | half}
no duplex
Syntax Description
Defaults Half-duplex operation
Command Modes Interface configuration mode
Command History
Usage Guidelines Table 2-1 lists the supported command options by interface.
auto Specifies the autonegotiation operation.
full Specifies the full-duplex operation.
half Specifies the half-duplex operation.
Release Modification
12.1(8a)EW Support for this command was introduced on the Catalyst 4500 series switch.
Table 2-1 Supported duplex Command Options
Interface Type
Supported
Syntax Default Setting Guidelines
10/100-Mbps module duplex [half |
full]
half If the speed is set to auto, you will
not be able to set the duplex mode.
If the speed is set to 10 or 100, and
you do not configure the duplex
setting, the duplex mode is set to half
duplex.
100-Mbps fiber
modules
duplex [half |
full]
half
Gigabit Ethernet
Interface
Not supported. Not supported. Gigabit Ethernet interfaces are set to
full duplex.
10/100/1000 duplex [half |
full]
If the speed is set to auto or 1000,
you will not be able to set duplex.
If the speed is set to 10 or 100, and
you do not configure the duplex
setting, the duplex mode is set to half
duplex.

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Cisco Catalyst 4500 Series Specifications

General IconGeneral
SeriesCatalyst 4500 Series
CategorySwitch
Layer SupportLayer 2, Layer 3
Form FactorModular chassis
StackableNo
Chassis Slots3, 6, 7, 10
Power Supply OptionsAC, DC
RedundancyPower supply, Supervisor engine
Network ManagementCisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
FeaturesSecurity, QoS
Port DensityUp to 384 ports per chassis
Security Features802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine8-E

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