Point-to-Point Protocol extensions for bridging
Fred Baker · 1991
This document defines an extension of the Internet Point-to-Point Protocol (PPP) described in RFC 1171, targeting the use of Point-to-Point lines for Remote Bridging. It is a product of the Point-to-Point Protocol Extensions Working Group of the Internet Engineering Task Force (IETF). This RFC specifies an IAB standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "IAB Official Protocol Standards " for the standardization state and status of this protocol. Distribution of this memo is unlimited. 2. Historical Perspective Two basic algorithms are ambient in the industry for Bridging of Local Area Networks. The more common algorithm is called "Transparent Bridging " and has been standardized for Extended LAN configurations by IEEE 802.1. IEEE 802.5 has proposed an alternative approach, called "Source Routing", and is in the process of standardizing that approach for IEEE 802.5 extended networks. Although there is a subcommittee of IEEE 802.1 addressing remote bridging, neither standard directly defines Remote Bridging per se, as that would technically be beyond the IEEE 802 committee’s charter. Both allow for it, however, modeling the line as an unspecified interface between half-bridges. This document assumes that the devices at either end of a serial link- have agreed to utilize the RFC 1171 line discipline in some form.- may have agreed, by some other means, to exchange other protocols on the line interspersed with each other and with any bridged PDUs.- may be willing to use the link as a vehicle for Remote Bridging.- may have multiple point-to-point links that are configured in parallel to simulate a single line of higher speed or