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JunosE 11.2.x Physical Layer Configuration Guide
equipment loopback
loopback
24
2^20—Pseudorandom test pattern, 1,048,575 bits in length
2^20-QRSS—Pseudorandom QRSS test pattern, 1,048,575 bits in length
2^23—Pseudorandom test pattern, 8,388,607 bits in length
alt-0-1—Repetitive alternating test pattern of zeros and ones, 01010101...
Specify the duration of the test in the range 1–1440 minutes.
Example
host1(config-controll)#bert pattern 2^15 interval 20
Use the no version to stop the test that is running.
See bert.
Use to enable or disable the router's ability to enter into a loopback initiated by a remote
device connected on a channelized T3 interface.
NOTE: Remote loopback is available only on channelized T3 interfaces configured to
use C-bit framing.
Specify one of the following loopback options:
customer—Enables the router to enter into loopback when it receives an appropriate
signal from the remote interface
network—Disables the router's ability to enter into loopback when it receives an
appropriate signal from the remote interface
Examples
host1(config-controll)#equipment customer loopback
host1(config-controll)#equipment network loopback
Use the no version to disable the router's ability to be placed in loopback by the remote
device.
See equipment loopback.
Use to configure a loopback.
Specify one of the following loopback options.
local—Loops the data back toward the router; on supported line modules, also sends
an alarm indication signal (AIS) out toward the network
network—Loops the data toward the network before the framer processes the data
Copyright © 2010, Juniper Networks, Inc.
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