Cisco Systems 8510 CSR, 8540 Initially Configuring Gigabit Ethernet Interfaces, Command Purpose

Chapter 4 Configuring Interfaces

About Layer 3 Switching Interfaces

Initially Configuring Gigabit Ethernet Interfaces

To configure an IP address and autonegotiation on a Gigabit Ethernet interface, perform the following steps, beginning in global configuration mode:

	Command	Purpose
Step 1
	Router(config)# interface gigabitethernet	Enters Ethernet interface configuration mode to
	slot/subslot/interface	configure the Gigabit Ethernet interface.
	Router(config-if)#
Step 2
	Router(config-if)# [no] negotiation auto	Specifies the negotiation mode.
		When you set negotiation mode to auto, the
		Gigabit Ethernet port attempts to negotiate the
		link (that is, both port speed and duplex setting)
		with the partner port.
		When you set the Gigabit Ethernet interface to no
		negotiation auto, the port forces the link up no
		matter what the partner port setting is. This brings
		up the link with 1000 Mbps and full duplex only.
Step 3
	Router(config-if)# ip address ip-address	Specifies the IP address and IP subnet mask to be
	subnet-mask	assigned to the Gigabit Ethernet interface.
Step 4
	Router(config-if)# exit	Returns to global configuration mode. Repeat
	Router(config)#	Steps 1 to 3 to configure another Gigabit Ethernet
		interface on this interface module.
Step 5
	Router(config)# end	Returns to privileged EXEC mode.
Step 6
	Router# copy system:running-config	Saves your configuration changes to NVRAM.
	nvram:startup-config

Example

The following example demonstrates initially configuring a Gigabit Ethernet interface with autonegotiation and an IP address:

Router(config)# interface gigabitethernet 0/0/0

Router(config-if)# negotiation auto

Router(config-if)#ip address 10.1.2.3 255.0.0.0

Router(config-if)# exit

Router(config)# ^Z

C8540-CSR#copy system:running-config nvram:startup-config

About the Enhanced Gigabit Ethernet Interfaces (Catalyst 8540)

The enhanced Gigabit Ethernet interface module provides two Gigabit Ethernet interfaces with built-in ACL support; no daughter card is required. The POS OC-12c uplink interface module and the ATM uplink interface module also include a single enhanced Gigabit Ethernet interface. See “Configuring the POS OC-12c Uplink Interface (Catalyst 8540)” section on page 4-14”and “Configuring the ATM Uplink Interface (Catalyst 8540)” section on page 4-28.

There is no special configuration required for the enhanced Gigabit Ethernet interfaces other than that used for other Gigabit Ethernet interfaces.

	Layer 3 Switching Software Feature and Configuration Guide
78-6235-04, Cisco IOS Release 12.0(10)W5(18)		4-5