Cisco Systems A9014CFD manual Path to the receiver path, 20-7, Local line

Chapter 20 Configuring T1/E1 Controllers

Troubleshooting Controllers

	Command	Purpose
Step 3
	controller t1 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 t1 0/0
Step 4
	loopback {diagnostic local {line	Sends the packets from a port in local loopback to the remote end.
	payload}}	• diagnostic—Configures the line card to loop data from the transmit
	Example:	path to the receiver path.
		• local line—Configures the T1 line card to loop the received traffic
	Router(config-controller)# loopback
		back to the remote device after passing them through the line
	local line
		loopback mode of the framer. The framer does not re-clock or reframe
		the incoming traffic.
		• local payload—Configures the T1 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

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09		20-7