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RFC1661 - часть 32


Discard-Request packets MUST only be sent in the LCP Opened state.

On reception, the receiver MUST silently discard any Discard-

Request that it receives.

Simpson [Page 37]

RFC 1661 Point-to-Point Protocol July 1994

A summary of the Discard-Request packet format is shown below. The

fields are transmitted from left to right.

0 1 2 3

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Code | Identifier | Length |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Magic-Number |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| Data ...

+-+-+-+-+

Code

11 for Discard-Request.

Identifier

The Identifier field MUST be changed for each Discard-Request

sent.

Magic-Number

The Magic-Number field is four octets, and aids in detecting links

which are in the looped-back condition. Until the Magic-Number

Configuration Option has been successfully negotiated, the Magic-

Number MUST be transmitted as zero. See the Magic-Number

Configuration Option for further explanation.

Data

The Data field is zero or more octets, and contains uninterpreted

data for use by the sender. The data may consist of any binary

value. The end of the field is indicated by the Length.

Simpson [Page 38]

RFC 1661 Point-to-Point Protocol July 1994

6. LCP Configuration Options

LCP Configuration Options allow negotiation of modifications to the

default characteristics of a point-to-point link. If a Configuration

Option is not included in a Configure-Request packet, the default

value for that Configuration Option is assumed.

Some Configuration Options MAY be listed more than once. The effect

of this is Configuration Option specific, and is specified by each

such Configuration Option description. (None of the Configuration

Options in this specification can be listed more than once.)

The end of the list of Configuration Options is indicated by the

Length field of the LCP packet.




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