Juniper JUNOSE 11.2.X MULTICAST ROUTING, Configuration Manual

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SONET/SDH section layer
• T1/E1 over SONET/SDH VT layer
• T3 layer
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T1/E1 over T3 layer
See “Interface Stack” on page 108 for a description of the layers.
To enable local or network loopback:
1.
Select a controller.
2.
Configure local or network loopback at the desired layers in the interface.
loopback
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Use to configure the type of loopback at the SONET/SDH section 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.
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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.
•
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.
•
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.
Copyright © 2010, Juniper Networks, Inc. 142
JunosE 11.2.x Physical Layer Configuration Guide