Cisco Systems 520 series manual Output Cause, Shutdown command, 12-4

Chapter 12 Troubleshooting

ATM Troubleshooting Commands

Table 12-1describes possible command output for the show interface command.

Table 12-1 show interface Command Output Description

Output

Cause

For ATM Interfaces

ATM 0 is up, line protocol is up	The ATM line is up and operating correctly.
ATM 0 is down, line protocol is down	• The ATM interface has been disabled with the
	shutdown command.
	or
	• The ATM line is down, possibly because the
	ADSL cable is disconnected or because the
	wrong type of cable is connected to the ATM
	port.
ATM 0.n is up, line protocol is up	The specified ATM subinterface is up and operating
	correctly.
ATM 0.n is administratively down, line protocol	The specified ATM subinterface has been disabled
is down	with the shutdown command.
ATM 0.n is down, line protocol is down	The specified ATM subinterface is down, possibly
	because the ATM line has been disconnected (by the
	service provider).
For Fast Ethernet Interfaces
Fast Ethernet n is up, line protocol is up	The specified Fast Ethernet interface is connected to
	the network and operating correctly.
Fast Ethernet n is up, line protocol is down	The specified Fast Ethernet interface has been
	correctly configured and enabled, but the Ethernet
	cable might be disconnected from the LAN.
Fast Ethernet n is administratively down, line	The specified Fast Ethernet interface has been
protocol is down	disabled with the shutdown command, and the
	interface is disconnected.
For Dialer Interfaces
Dialer n is up, line protocol is up	The specified dialer interface is up and operating
	correctly.
Dialer n is down, line protocol is down	• This is a standard message and may not indicate
	anything is actually wrong with the
	configuration.
	or
	• If you are having problems with the specified
	dialer interface, this can mean it is not
	operating, possibly because the interface has
	been brought down with the shutdown
	command, or the ADSL cable is disconnected.

	Cisco Secure Router 520 Series Software Configuration Guide
12-4	OL-14210-01