Reject a Configure-request frame because it is not recognizable or because the requested configuration is not acceptable. Acknowledge the receipt of a recognizable Configure-request frame, but reject some or all of the requested configuration.Ĭode 0x03. Represents the end of the link establishment phase.Ĭode 0x03. Acknowledge the receipt of a recognizable Configure-request frame, and accept the requested configuration. Terminate-request frames are transmitted periodically until either a valid response is received, or the number of frames sent exceeds the value of the lcp_max_restart parameter in the file ppp.conf.Ĭ ode 0x02. Represents the start of the link establishment phase. Request the establishment of a link with a particular configuration. The Link configuration frames are:Ĭode 0x01. The data field of a link configuration frame carries information used to negotiate the configuration options for the link. Link configuration frames are transmitted during the link establishment phase. If two frames of the same type with the same magic number are received, there is a high probability that the link is looped back, and that the second frame is a reflection of the original. When set, it contains a unique, randomly-generated sequence of digits that identifies the initial source of the frame. The magic number is a negotiated parameter, and is set to zero by default. In some cases, the data field includes a magic number, which is four octets in length, and which is used to detect a looped-back condition and other link level anomalies. It contains the information associated with the frame, which may be configuration options, frame information, or simple data. The data field is zero or more octets in length, as indicated by the length field. The length must not exceed the maximum receive unit (MRU). The length field is two octets in length, and indicates the total length of the LCP frame including the Code, Id, length, and data fields. The id field is one octet in length, and carries an identifier that is used to match associated requests and replies.
Lcp packets are carried in the field of the ppp frame code#
The code field is one octet in length and identifies the type of LCP frame, based on the following codes:Ġx05 Terminate-requestĐx0bĝiscard-request The protocol id identifies the type of information contained in the information field of the frame, and is always 0xc021 for LCP frames. The control field is one octet in length, and is part of the HDLC-like framing for PPP. The address field is one octet in length, and is part of the HDLC-like framing for PPP. The PPP link, and to test and maintain the link, once it is established.
They are used to negotiate the configuration of Phases, and periodically during the life of the link.
The link control protocol (LCP) frames are transmitted during the link establishment and termination
0 kommentar(er)
