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undo loopback

View

CT1/PRI interface view

Parameter

local: Enables the CT1/PRI interface to perform local loopback.

 

payload: Enables the interface to perform external payload loopback.

 

remote: Enables the interface to perform remote loopback.

Description

Use the loopback command to enable local, remote, or external payload

 

loopback on the CT1/PRI interface.

 

Use the undo loopback command to restore the default.

 

By default, loopback is disabled.

 

Loopback is intended for checking the condition of interfaces or cables. Disable it

 

otherwise.

 

You can bundle timeslots on a CT1/PRI interface to form a serial interface and

 

encapsulate it with PPP. After you enable loopback on this serial interface, it is

 

normal that the state of the link layer protocol is reported down.

Example

# Enabled remote loopback on interface T1 2/0.

 

<Sysname> system-view

 

[Sysname] controller t1 2/0

 

[Sysname-T1 2/0] loopback remote

pri-set (CT1/PRI interface view)

Syntax pri-set [ timeslot-list list ]

undo pri-set

View CT1/PRI interface view

Parameter list: Specifies timeslots to be bundled. Timeslots are numbered 1 through 24. You may specify a single timeslot by specifying a number, a range of timeslots by specifying a range in the form of number1-number2, or several discrete timeslots by specifying number1, number2-number3.

Description Use the pri-setcommand to bundle timeslots into a PRI set on the CT1/PRI interface.

Use the undo pri-setcommand to remove the timeslot bundle.

By default, no PRI set is created.

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3Com MSR 50, MSR 30 manual Pri-set CT1/PRI interface view, Remote Enables the interface to perform remote loopback