RFC 1172 (rfc1172) - Page 2 of 38
Point-to-Point Protocol (PPP) initial configuration options
Alternative Format: Original Text Document
RFC 1172 PPP Initial Options July 1990 2.1. Maximum-Receive-Unit Description This Configuration Option provides a way to negotiate the maximum packet size used across one direction of a link. By default, all implementations must be able to receive frames with 1500 octets of Information. This Configuration Option may be sent to inform the remote end that you can receive larger frames, or to request that the remote end send you smaller frames. If smaller frames are requested, an implementation MUST still be able to receive 1500 octet frames in case link synchronization is lost. A summary of the Maximum-Receive-Unit Configuration Option 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Maximum-Receive-Unit | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type 1 Length 4 Maximum-Receive-Unit The Maximum-Receive-Unit field is two octets and indicates the new maximum receive unit. The Maximum-Receive-Unit covers only the Data Link Layer Information field but not the header, trailer or any transparency bits or bytes. Default 1500 Perkins & Hobby
