Справочник по сетевым протоколам


RFC1661 - часть 19


terminates the connection.

Receive-Echo-Request, Receive-Echo-Reply, Receive-Discard-Request

(RXR)

This event occurs when an Echo-Request, Echo-Reply or Discard-

Request packet is received from the peer. The Echo-Reply packet

is a response to an Echo-Request packet. There is no reply to an

Echo-Reply or Discard-Request packet.

Simpson [Page 20]

RFC 1661 Point-to-Point Protocol July 1994

4.4. Actions

Actions in the automaton are caused by events and typically indicate

the transmission of packets and/or the starting or stopping of the

Restart timer.

Illegal-Event (-)

This indicates an event that cannot occur in a properly

implemented automaton. The implementation has an internal error,

which should be reported and logged. No transition is taken, and

the implementation SHOULD NOT reset or freeze.

This-Layer-Up (tlu)

This action indicates to the upper layers that the automaton is

entering the Opened state.

Typically, this action is used by the LCP to signal the Up event

to a NCP, Authentication Protocol, or Link Quality Protocol, or

MAY be used by a NCP to indicate that the link is available for

its network layer traffic.

This-Layer-Down (tld)

This action indicates to the upper layers that the automaton is

leaving the Opened state.

Typically, this action is used by the LCP to signal the Down event

to a NCP, Authentication Protocol, or Link Quality Protocol, or

MAY be used by a NCP to indicate that the link is no longer

available for its network layer traffic.

This-Layer-Started (tls)

This action indicates to the lower layers that the automaton is

entering the Starting state, and the lower layer is needed for the

link. The lower layer SHOULD respond with an Up event when the

lower layer is available.

This results of this action are highly implementation dependent.

This-Layer-Finished (tlf)

This action indicates to the lower layers that the automaton is

entering the Initial, Closed or Stopped states, and the lower

layer is no longer needed for the link.




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