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

125

loopback

Syntax	loopback { cell local payload remote }
	undo loopback
View	ATM E3/T3 interface view
Parameter	cell: Internal cell loopback, used to check whether the local end physical chipset is
	working properly
	local: Internal loopback, used to check whether the local service chip is working
	properly.
	payload: External payload loopback, used to check whether payload framing is
	normal.
	remote: External line loopback, used to check whether the remote end is working
	properly.
Description	Use the loopback command to configure the loopback mode on the ATM E3/T3
	interface.
	Use the undo loopback command to disable loopback.
	By default, loopback is disabled.
Example	# Enable external payload loopback on ATM E3/T3 interface 5/0.
	<Sysname> system-view
	[Sysname] interface atm 5/0
	[Sysname-Atm5/0] loopback payload

scramble

Syntax scramble

undo scramble

View ATM E3/T3 interface view

Parameter None

Description Use the scramble command to enable payload scrambling on the ATM E3/T3 interface. This, however, does not affect cell headers.

Use the undo scramble command to disable payload scrambling.

By default, payload scrambling is enabled on an ATM E3/T3 interface.