Juniper JUNOSE 10.0.X PHYSICAL LAYER, Configuration Manual

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local —Loops the data back toward the router; on supported line modules,
also sends an alarm indication signal (AIS) out toward the network.
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network —Loops the data toward the network before the data reaches the
frame.
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Example
host1(config)# controller sonet 4/0
host1(config-controller)# loopback network
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Use the no version to disable loopback.
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See loopback.
path ds1|e1 loopback
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Use to configure a loopback at the T1/E1 over SONET/SDH VT layer.
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Specify one of the following options:
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local —Loops the router output data back toward the router at the T1/E1
framer; on supported line modules, also sends an alarm indication signal
(AIS) out toward the network.
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network { line | payload }
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Specify the line keyword to loop the data back toward the network before
the T1/E1 framer and automatically set a local loopback at the HDLC
controllers.
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Specify the payload keyword to loop the payload data back toward the
network at the T1/E1 framer and automatically set a local loopback at
the HDLC controllers.
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Example
host1(config-controll)# path 12 ds1 1/3/4 loopback network line
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Use the no version to clear the local loopback configuration.
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See path ds1|e1 loopback.
path ds3 loopback
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Use to configure a loopback at the T3 layer.
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Specify one of the following options:
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local —Loops the data back toward the router; on supported line modules,
also sends an alarm indication signal (AIS) out toward the network.
■
network { line | payload }
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Specify the line keyword to loop the data toward the network before the
data reaches the framer.
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Specify the payload keyword to loop the data toward the network after
the framer has processed the data.
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Example
148 ■
Testing Interfaces
JUNOSe 10.0.x Physical Layer Configuration Guide