3Com MSR 50, MSR 30 manual Loopback CE3 interface view, National-bit 0, Undo national-bit

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loopback (CE3 interface view)

Syntax	loopback { local payload remote }
	undo loopback
View	CE3 interface view
Parameter	local: Enables internal loopback on the CE3 interface.
	payload: Enables external payload loopback on the CE3 interface.
	remote: Enables external loopback on the CE3 interface.
Description	Use the loopback command to configure the loopback mode of the CE3
	interface.
	Use the undo loopback command to restore the default.
	By default, loopback is disabled on the CE3 interface.
	Loopback is intended for test use. Disable it otherwise.
	If a CE3 interface encapsulated with PPP is placed in a loopback, it is normal that
	the state of the link layer protocol is reported down.
Example	# Enable internal loopback on interface E3 2/0.
	<Sysname> system-view
	[Sysname] controller e3 2/0
	[Sysname-E3 2/0] loopback local

national-bit

Syntax	national-bit { 0 1 }
	undo national-bit
View	CE3 interface view
Parameter	0: Sets the national bit of the CE3 interface to 0.
	1: Sets the national bit of the CE3 interface to 1.
Description	Use the national-bitcommand to configure the national bit on the CE3
	interface.
	Use the undo national-bitcommand to restore the default, that is, 1.