IBM SC30-3681-08 manual Mppe mandatory/optional stateless/stateful, Mandatory, Optional, Stateless

Con®guring PPP Interfaces (Talk 6)

If Lower DTR is set to ªenabledº, then the DTR signal will be dropped when the interface is disabled. This behavior may be desirable in situations where the interface has been con®gured as an alternate link for WAN Reroute and the interface is connected to a dial-out modem which maintains its dial connection based on the state of the DTR signal.

When the interface is disabled, the DTR signal is low and the modem keeps the dial connection down. When the interface is enabled, due to a WAN Reroute backup scenario, DTR is raised and the modem dials a stored number to the backup site. When the primary interface is restored, the alternate interface is disabled, DTR is lowered, and the modem hangs up the dial connection.

The following cable types are supported:

RS-232

V.35

V.36

	Note: The enable lower-dtrcommand is not supported on PPP dial circuit
	interfaces.
mp	Enables the Multilink Protocol (MP) on this interface. See ªChapter 34.
	Using the Multilink PPP Protocolº on page 509 for more information.
	Example:
	enable mp
	Enabled as a MP link
	Is this link a dedicated MP link? [no] yes
	MP interface for this MP link? [0] 3
mppe [mandatory/optional] [stateless/stateful]
	Enables Microsoft Point-to-Point Encryption (MPPE). If MS-CHAP is not
	enabled on the interface, then MPPE cannot be enabled on that interface.
	See ªMicrosoft Point-to-Point Encryption (MPPE)º in the chapter ªOverview
	of Encryptionº in Using and Con®guring Featuresfor more information.
	mandatory
	The client and the server must negotiate MPPE or the link will drop.
	optional
	The client will attempt to negotiate MPPE, but if the negotiation
	fails, the PPP link will remain active.
	stateless
	Session keys will be regenerated after transmitting each packet.
	This function is currently not supported by Microsoft Dial-Up
	Networking (DUN) clients.
	stateful
	Session keys will be regenerated after transmitting every 256
	packets.
mschap
	Enables MS-CHAP authentication. When you enable MS-CHAP, you are
	prompted to provide the authenticator rechallenge interval. This value in
	seconds de®nes the length of time that will pass before the authenticator
	sends another challenge to the receiver of the authentication request to
	recon®rm the authentication. The value 0 indicates that no further
	challenges will be sent after the initial authentication.

Chapter 33. Con®guring and Monitoring Point-to-Point Protocol Interfaces 469