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RFC1661 - часть 20


The lower layer SHOULD

respond with a Down event when the lower layer has terminated.

Simpson [Page 21]

RFC 1661 Point-to-Point Protocol July 1994

Typically, this action MAY be used by the LCP to advance to the

Link Dead phase, or MAY be used by a NCP to indicate to the LCP

that the link may terminate when there are no other NCPs open.

This results of this action are highly implementation dependent.

Initialize-Restart-Count (irc)

This action sets the Restart counter to the appropriate value

(Max-Terminate or Max-Configure). The counter is decremented for

each transmission, including the first.

Implementation Note:

In addition to setting the Restart counter, the implementation

MUST set the timeout period to the initial value when Restart

timer backoff is used.

Zero-Restart-Count (zrc)

This action sets the Restart counter to zero.

Implementation Note:

This action enables the FSA to pause before proceeding to the

desired final state, allowing traffic to be processed by the

peer. In addition to zeroing the Restart counter, the

implementation MUST set the timeout period to an appropriate

value.

Send-Configure-Request (scr)

A Configure-Request packet is transmitted. This indicates the

desire to open a connection with a specified set of Configuration

Options. The Restart timer is started when the Configure-Request

packet is transmitted, to guard against packet loss. The Restart

counter is decremented each time a Configure-Request is sent.

Send-Configure-Ack (sca)

A Configure-Ack packet is transmitted. This acknowledges the

reception of a Configure-Request packet with an acceptable set of

Configuration Options.

Send-Configure-Nak (scn)

A Configure-Nak or Configure-Reject packet is transmitted, as

appropriate. This negative response reports the reception of a

Simpson [Page 22]

RFC 1661 Point-to-Point Protocol July 1994

Configure-Request packet with an unacceptable set of Configuration

Options.

Configure-Nak packets are used to refuse a Configuration Option




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