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# path overhead j1

#### Syntax

For channelized OCx/STMx interfaces:

[ no ] path pathChannel overhead j1 { msg | exp-msg } [ message ]

For unchannelized OCx/STMx interfaces:

[ no ] path overhead j1 { msg | exp-msg } [ message ]

#### Release Information

Command introduced before JUNOSe Release 7.1.0.

#### Description

Specifies trace messages to check for connectivity between the router and the SONET/SDH device at the other end of the line. The no version restores the default situation, in which all characters of the trace message are zeros.

#### Options

- pathChannel—Number, in the range 1–2147483648, that identifies the path on a channelized interface
- msg—Specifies that the message is one that the router sends
- exp-msg—Specifies that the message is one that the router expects to receive
- message—Text of the message; the maximum is 15 characters for SDH mode and 62 characters for SONET mode

#### Mode

Controller Configuration

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