Cisco Systems EHWIC1GESFPCU manual Configuring Loopback, Detailed Steps

Configuring Loopback

DETAILED STEPS

	Command or Action		Purpose
Step 1	enable		Enables privileged EXEC mode.
			• Enter your password if prompted.
	Example:
	Router> enable
Step 2	configure terminal		Enters global configuration mode.
	Example:
	Router# configure terminal
Step 3	interface type slot/subslot/port number		Enters the configuration mode for
			Ethernet transport on the EHWIC
	Example:		interface on the router.
	Router(config)# interface ethernet
	0/3/0
Step 4	ip address ip-address mask		Sets the IP address and subnet mask for
			the interface.
	Example:
	Router(config-if)# ip address
	192.168.12.2	255.255.255.0
Step 5	shutdown		Disables the interface, changing its state
			from administratively up to
	Example:		administratively down.
	Router(config-if)# shutdown
Step 6	no shutdown		Enables the interface, changing its state
			from administratively down to
	Example:		administratively up.
	Router(config-if)# no shutdown
Step 7	exit		Exits configuration mode and returns to
			global configuration mode.
	Example:
	Router(config-if)# exit
	Router(config)#

Configuring Loopback

Use the loopback command in interface configuration mode to configure loopback. The

EHWIC 1 GE-SFP-CU supports MAC layer loopback and driver type loopback. The MAC loopback is used to detect MAC failure. The driver loopback is used to detect transceiver failure. Use the show interface to see the loopback mode and check if the hardware is functional.

Configuring Gigabit Ethernet Enhanced High-Speed WAN Interface Cards

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