Configuring Interface Speed And Duplex Mode - Cisco Catalyst 3560-X Software Configuration Manual

Chapter 1 Configuring Interface Characteristics
Table 1-3 Default Layer 2 Ethernet Interface Configuration (continued)
Feature
Port blocking (unknown multicast and
unknown unicast traffic)
Broadcast, multicast, and unicast storm
control
Protected port
Port security
Port Fast
Auto-MDIX
Power over Ethernet (PoE)

Configuring Interface Speed and Duplex Mode

Ethernet interfaces on the switch operate at 10, 100, 1000, or 10,000 Mb/s and in either full- or
half-duplex mode. In full-duplex mode, two stations can send and receive traffic at the same time.
Normally, 10-Mb/s ports operate in half-duplex mode, which means that stations can either receive or
send traffic.
Switch models include Gigabit Ethernet (10/100/1000-Mb/s) ports, 10-Gigabit Ethernet ports, and small
form-factor pluggable (SFP) module slots supporting SFP modules.
These sections describe how to configure the interface speed and duplex mode:
•
•
Speed and Duplex Configuration Guidelines
When configuring an interface speed and duplex mode, note these guidelines:
•
•
•
OL-25303-03
Default Setting
Disabled (not blocked) (Layer 2 interfaces only). See the
Blocking" section on page
Disabled. See the
Disabled (Layer 2 interfaces only). See the
section on page
Disabled (Layer 2 interfaces only). See the
Configuration" section on page
Disabled. See the
page 1-12.
Enabled.
The switch might not support a pre-standard powered device—such as
Note
Cisco IP phones and access points that do not fully support IEEE
802.3af—if that powered device is connected to the switch through a
crossover cable. This is regardless of whether auto-MIDX is enabled on
the switch port.
Enabled (auto).
Speed and Duplex Configuration Guidelines, page 1-31
Setting the Interface Speed and Duplex Parameters, page 1-32
The 10-Gigabit Ethernet ports do not support the speed and duplex features. These ports operate
only at 10,000 Mb/s and in full-duplex mode.
Gigabit Ethernet (10/100/1000-Mb/s) ports support all speed options and all duplex options (auto,
half, and full). However, Gigabit Ethernet ports operating at 1000 Mb/s do not support half-duplex
mode.
For SFP module ports, the speed and duplex CLI options change depending on the SFP module type:
The 1000BASE-x (where -x is -BX, -CWDM, -LX, -SX, and -ZX) SFP module ports support
–
the nonegotiate keyword in the speed interface configuration command. Duplex options are not
supported.
1-7.
"Default Storm Control Configuration" section on page
1-6.
1-11.
"Default Optional Spanning-Tree Configuration" section on
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
Configuring Ethernet Interfaces
"Configuring Port
"Configuring Protected Ports"
"Default Port Security
1-3.
1-31