Cisco 7604 Configuration Manual page 132

Configuring Optional Interface Features
To configure the port speed for a 10/100 or a 10/100/1000-Mbps Ethernet port, perform this task:
Command
Step 1
Router(config)# interface fastethernet slot/port
Step 2
Router(config-if)# speed {10 | 100 | 1000 |
{auto [10 100 [1000]]}}
Router(config-if)# no speed
Release 12.2(17a)SX and later releases support the 10 100 1000 keywords after the auto keyword. When
configuring the port speed for a 10/100/1000-Mbps Ethernet port with Release 12.2(17a)SX and later
releases, note the following:
•
•
This example shows how to configure the speed to 100 Mbps on the Fast Ethernet port 5/4:
Router(config)# interface fastethernet 5/4
Router(config-if)# speed 100
Setting the Interface Duplex Mode
Note •
•
To set the duplex mode of an Ethernet or Fast Ethernet port, perform this task:
Command
Step 1
Router(config)# interface fastethernet slot/port
Step 2
Router(config-if)# duplex [auto | full | half]
Router(config-if)# no duplex
This example shows how to set the duplex mode to full on Fast Ethernet port 5/4:
Router(config)# interface fastethernet 5/4
Router(config-if)# duplex full
Configuring Link Negotiation on Gigabit Ethernet Ports
Note Link negotiation does not negotiate port speed.
On Gigabit Ethernet ports, link negotiation exchanges flow-control parameters, remote fault
information, and duplex information. Link negotiation is enabled by default.
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
9-8
Enter the auto 10 100 keywords to restrict the negotiated speed to 10-Mbps or 100-Mbps.
The auto 10 100 1000 keywords have the same effect as the auto keyword by itself.
10-Gigabit Ethernet and Gigabit Ethernet are full duplex only. You cannot change the duplex mode
on 10-Gigabit Ethernet or Gigabit Ethernet ports or on a 10/100/1000-Mps port configured for
Gigabit Ethernet.
If you set the port speed to auto on a 10/100-Mbps or a 10/100/1000-Mbps Ethernet port, both speed
and duplex are autonegotiated. You cannot change the duplex mode of autonegotiation ports.
Purpose
Selects the Ethernet port to be configured.
Configures the speed of the Ethernet interface.
Reverts to the default configuration (speed auto).
Purpose
Selects the Ethernet port to be configured.
Sets the duplex mode of the Ethernet port.
Reverts to the default configuration (duplex auto).
Chapter 9 Configuring Interfaces
OL-4266-08