Configuring Ethernet Interface Speed And Duplex Mode - Cisco 7609 Configuration Manual
Cisco ios software configuration guide—12.1e
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Chapter 6
Configuring Interfaces
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Configuring Ethernet Interface Speed and Duplex Mode
These sections describe how to configure Ethernet port speed and duplex mode:
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Speed and Duplex Mode Configuration Guidelines
You usually configure Ethernet port speed and duplex mode parameters to auto and allow the Cisco 7600
series router to negotiate the speed and duplex mode between ports. If you decide to configure the port
speed and duplex modes manually, consider the following information:
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Note
Cisco 7600 series routers cannot automatically negotiate Ethernet port speed and duplex mode if the
connecting port is configured to a value other than auto.
Changing the Ethernet port speed and duplex mode configuration might shut down and reenable the
Caution
interface during the reconfiguration.
Setting the Ethernet Interface Speed
If you set the Ethernet port speed to auto on a 10/100-Mbps or 10/100/1000-Mbps Ethernet port, both
Note
speed and duplex are autonegotiated.
78-14064-04
Configuring IEEE 802.3Z Flow Control, page 6-14
Configuring the Port Debounce Timer, page 6-15
Adding a Description for an Interface, page 6-16
Speed and Duplex Mode Configuration Guidelines, page 6-7
Setting the Ethernet Interface Speed, page 6-7
Setting the Interface Duplex Mode, page 6-8
Configuring Link Negotiation on Gigabit Ethernet Ports, page 6-8
Displaying the Speed and Duplex Mode Configuration, page 6-9
If you set the Ethernet port speed to auto, the router automatically sets the duplex mode to auto.
If you enter the no speed command, the router automatically configures both speed and duplex to
auto.
If you configure an Ethernet port speed to a value other than auto (for example, 10, 100, or
1000 Mbps), configure the connecting port to match. Do not configure the connecting port to
negotiate the speed.
If you manually configure the Ethernet port speed to either 10 or 100 Mbps, the router prompts you
to also configure the duplex mode on the port.
Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
Configuring Optional Interface Features
6-7
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