Chapter 2 Cisco 3270 Rugged Router Card

Ethernet Port Speed and Duplex Mode

The router cannot automatically negotiate port speed and duplex mode unless the connecting port is configured speed auto, duplex auto, or no speed. If the port speed is set to a value other than auto, such as 10, 100, or 1000-Mbps, configure the remote link partner port to match the local settings; do not configure the link partner port to auto.

If a copper Gigabit Ethernet port speed is configured as 1000-Mbps, it must be configured as duplex auto mode; otherwise the link will not come up. We recommend that you use the speed auto command and duplex auto command to configure a Gigabit Ethernet port.

The fiber-optic Gigabit Ethernet port does not allow users to configure the mode as speed or duplex. The port speed and mode are determined by the SFP module.

Note

Changing the Ethernet port speed and duplex mode configuration might shut down and reenable the

 

 

 

interface during the reconfiguration.

 

 

 

 

 

 

 

 

 

 

The procedure to set the port speed for a copper Gigabit Ethernet port is as follows:

 

 

 

 

 

 

 

 

 

 

Command

Purpose

 

 

 

 

Step 1

 

Router(config)# interface GigabitEthernet slot/port

Selects the Ethernet port to be configured.

 

 

 

 

Step 2

 

Router(config-if)# speed {10 100 1000 auto}

Sets the speed of the Ethernet interface.

 

 

 

 

Default

 

Router(config-if)# no speed

Reverts to the default configuration (speed

 

 

 

 

 

auto). If you set the port speed to auto on a

 

 

 

 

 

10/100/1000-Mbps Ethernet port, speed is

 

 

 

 

 

autonegotiated.

 

 

 

 

 

 

 

 

 

To set the mode on a copper Gigabit Ethernet port to duplex?

 

 

 

 

 

 

 

 

 

 

Command

Purpose

 

 

 

 

Step 1

 

Router(config)# interface GigabitEthernet slot/port

Selects the Ethernet port to be configured.

 

 

 

 

Step 2

 

Router(config-if)# duplex [auto full half]

Sets the duplex mode of the Ethernet port.

 

 

 

 

Default

 

Router(config-if)# no duplex

Reverts to the default configuration (duplex

 

 

 

 

 

auto).

 

 

 

 

 

 

 

 

 

 

Note

The Gigabit Ethernet optical fiber interface only supports full duplex mode; a Cisco IOS command to

 

 

 

set the mode is not is supported.

 

 

 

 

 

 

 

Cisco 3200 Series Router Hardware Reference

2-6

OL-5816-10

 

 

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Cisco Systems 3200 manual Ethernet Port Speed and Duplex Mode, Command Purpose, Auto

3200 specifications

Cisco Systems 3200 Series routers are designed to deliver high-performance, reliable networking solutions for enterprise and service provider environments. They are part of Cisco's extensive portfolio that addresses the challenges of modern networking, particularly in connecting remote offices and branch locations efficiently and securely.

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The router series also benefits from Cisco's extensive software ecosystem, which includes Cisco IOS (Internetwork Operating System). IOS provides a familiar interface for network administrators, alongside a wealth of features for configuration and management. Furthermore, the Cisco 3200 Series is designed to integrate with Cisco's Application Policy Infrastructure Controller (APIC) and Software-Defined Networking (SDN) solutions, offering enhanced flexibility in managing network resources.

Connectivity options for the Cisco 3200 Series are extensive, offering support for various WAN technologies, including MPLS, LTE, and broadband internet. This versatility enables organizations to choose the best connectivity solutions according to their geographic and operational requirements.

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