Cisco Systems A9014CFD manual Troubleshooting T1 Controllers, Receiver, Incoming traffic, 20-6

Chapter 20 Configuring T1/E1 Controllers

Troubleshooting Controllers

	Command	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
	controller e1 slot/subslot	Sets the controller type. The command has the following syntax:
		• slot—Slot number of the interface.
	Example:	• subslot—0.
	Router(config-controller)#
	controller e1 0/0
Step 4
	loopback {local network {line	Sends the packets from a port in local loopback to the remote end.
	payload}}	• local—Configures the line card to loop the transmitted traffic back to
	Example:	the line card as E1 received traffic and transmits AIS to the remote
		receiver.
	Router(config-controller)# loopback	• network line—Configures the E1 line card to loop the received traffic
	network line
		back to the remote device after passing them through the line
		loopback mode of the framer. The framer does not re-clock or reframe
		the incoming traffic.
		• network payload—Configures the E1 line card to loop the received
		traffic back to the remote device after passing them through the
		payload loopback mode of the framer. The framer re-clocks and
		reframes the incoming traffic before sending it to the network.
Step 5
	exit	Exits controller configuration mode.
	Example:
	Router(config-controller)# exit

Troubleshooting T1 Controllers

		To troubleshoot the T1 line card, complete the following steps in the controller configuration mode:
	Command		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
		Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
20-6			OL-23826-09