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    loopback

    Syntax

    For module controllers, the options available vary depending on the module being configured.

    CT3 module:

    loopback { local | network | payload }

    no loopback

    [ no ] loopback remote

    cOCx/STMx SONET controller (SONET/SDH section layer), OCx/STMx line modules:

    loopback { local | network }

    no loopback

    COCX-F3 module:

    loopback { local | network | payload }

    no loopback

    For interfaces; the options available vary depending on the interface being configured.

    ATM interface (cannot be used on a subinterface):

    loopback { diagnostic | line }

    no loopback

    POS interface:

    [ no ] loopback { internal | line }

    Release Information

    Command introduced before JunosE Release 7.1.0.

    Description

    Specifies the loopback mode for a module controller or interface. The no version clears all loopback on the module or interface (the default), or deletes the mapping to the user domain name.

    Note: In Domain Map Configuration mode, this command has been replaced by the local-interface command and may be removed completely from Domain Map Configuration mode in a future release.

    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 payload—Loops the data toward the network after the framer has processed the data.
    • network line—Loops the data toward the network before the data reaches the framer.
    • remote—Sends a signal notifying the device at the remote end to activate or deactivate the line loopback.
    • network—Loops the data toward the network before the data reaches the framer.
    • payload—Loops the data toward the network after the framer has processed the data.
    • diagnostic—Places the interface into internal loopback
    • line—ATM interface: places the interface into external loopback; POS interface: connects the received network signal directly to the transmit network signal. When configured in line loopback mode, the router never receives data from the network.
    • internal—Connects the local transmitted signal to the local received signal

    Mode

    Controller Configuration, Interface Configuration

    Published: 2014-08-14