128CHAPTER 4: ATM OC-3C/STM-1 INTERFACE CONFIGURATION COMMANDS

sonet: Sets the framing format to SONET OC-3, the optical carrier level three (OC-3 of synchronous optical network (SONET).

Description Use the frame-formatcommand to set the framing format for an ATM OC-3c/STM-1 interface.

Use the undo frame-formatcommand to restore the default, that is, SDH

STM-1.

Example # Set the framing format to SDH STM-1 on an ATM OC-3c/STM-1 interface.

<Sysname> system-view

[Sysname] interface atm 5/0

[Sysname-Atm5/0] frame-format sdh

loopback

Syntax

loopback { cell local remote }

 

undo loopback

View

ATM OC-3c interface view, STM-1 interface view

Parameter

cell: Enables internal cell loopback.

 

local: Enables internal loopback.

 

remote: Enables external loopback.

Description

Use the loopback command to configure the loopback mode on the ATM

 

OC-3c/STM-1 interface.

 

Use the undo loopback command to disable loopback.

 

By default, loopback is disabled.

 

Loopback is intended for test use. Disable it otherwise.

Example

# Enable internal loopback on ATM interface 5/0.

 

<Sysname> system-view

 

[Sysname] interface atm 5/0

 

[Sysname-Atm5/0] loopback local

scramble

Syntax scramble

undo scramble

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3Com MSR 30, MSR 50 manual Loopback cell local remote