R0106-HP MSR Router Series Interface Command Reference(V7)

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loopback

Use loopback to enable loopback detection on the ATM interface and set the detection mode.

Use undo loopback to restore the default.

Syntax

loopback { cell | local | remote }

undo loopback

Default

Loopback detection is disabled.

Views

ATM OC-3c/STM-1 interface view

Predefined user roles

network-admin

Parameters

cell: Enables internal cell loopback detection to check physical chips on the local end.

local: Enables internal loopback detection to check service chips on the local end.

remote: Enables external line loopback detection to check the remote end.

Usage guidelines

Loopback is intended for testing. Disable loopback for other operations.

Examples

# Enable internal loopback detection on interface ATM 2/4/0.

<Sysname> system-view

[Sysname] interface atm 2/4/0

[Sysname-ATM2/4/0] loopback local

scramble

Use scramble to enable payload scrambling on the ATM interface.

Use undo scramble to disable payload scrambling.