Справочник по сетевым протоколам


RFC1661 - часть 25


| Options ...

+-+-+-+-+

Code

1 for Configure-Request.

Identifier

The Identifier field MUST be changed whenever the contents of the

Options field changes, and whenever a valid reply has been

received for a previous request. For retransmissions, the

Identifier MAY remain unchanged.

Options

The options field is variable in length, and contains the list of

zero or more Configuration Options that the sender desires to

negotiate. All Configuration Options are always negotiated

simultaneously. The format of Configuration Options is further

described in a later chapter.

Simpson [Page 28]

RFC 1661 Point-to-Point Protocol July 1994

5.2. Configure-Ack

Description

If every Configuration Option received in a Configure-Request is

recognizable and all values are acceptable, then the

implementation MUST transmit a Configure-Ack. The acknowledged

Configuration Options MUST NOT be reordered or modified in any

way.

On reception of a Configure-Ack, the Identifier field MUST match

that of the last transmitted Configure-Request. Additionally, the

Configuration Options in a Configure-Ack MUST exactly match those

of the last transmitted Configure-Request. Invalid packets are

silently discarded.

A summary of the Configure-Ack 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 |

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

| Options ...

+-+-+-+-+

Code

2 for Configure-Ack.

Identifier

The Identifier field is a copy of the Identifier field of the

Configure-Request which caused this Configure-Ack.

Options

The Options field is variable in length, and contains the list of

zero or more Configuration Options that the sender is

acknowledging. All Configuration Options are always acknowledged

simultaneously.

Simpson [Page 29]

RFC 1661 Point-to-Point Protocol July 1994




- Начало -  - Назад -  - Вперед -