Dynamically Switched Link Control Protocol (RFC1307)
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2019-Feb-11
Internet Society Requests For Comment (RFCs)
J. Young: AUTHOR [+1]
This memo describes an experimental protocol developed by a project team at Cray Research, Inc., in implementing support for circuit-switched T3 services. The protocol is used for the control of network connections external to a host, but known to the host. This memo defines an Experimental Protocol for the Internet community.
Network Working Group J. Young Request for Comments: 1307 A. Nicholson Cray Research, Inc. March 1992
Dynamically Switched Link Control Protocol
Status of this Memo
This memo defines an Experimental Protocol for the Internet community. Discussion and suggestions for improvement are requested. 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.
This memo describes an experimental protocol developed by a project team at Cray Research, Inc., in implementing support for circuit- switched T3 services. The protocol is used for the control of network connections external to a host, but known to the host. It is documented here for the benefit of others who may wish to perform further research.
While working with circuit-switched T3 networks, developers at Cray Research, Inc., defined a model wherein a host would generate control messages for a network switch. This work is described in RFC 1306, "Experiences Supporting By-Request Circuit-Switched T3 Networks". In order to simplify the model it was decided that the inconsistencies of switch control should be hidden from the host generating the control messages. To that end, a protocol was defined and implemented. This RFC documents the Dynamically Switched Link Control Protocol (DSLCP), which is used for creation and control of downstream network links by a host.
The Dynamically Switched Link Control Protocol (DSLCP) allows a host with knowledge of a special downstream network link to issue messages to control the status of that link.
This document describes the functions of the DSLCP to control external network connections.
Young & Nicholson [Page 1]
RFC 1307 Dynamically Switched Link Control Protocol March 1992
Circuit Switched Networks are becoming available to the Internet community. These networks are made available by requesting a connection through a switch. Normally circuit switched network links are disconnected, and their prohibitive cost suggests that it is very costly to leave them connected at all times.
Internet users and hosts wish to send data over a circuit switched networks, but only connect the network links when a transport connection is to be established. While it would be possible to use packet routers to identify the need for switching a connection on and off, only the transport provider can positively identify the beginning and end of a transport session. There must be a mechanism to activate and deactivate the link at the beginning and end of a transport session.
The DSLCP assumes that a transport provider has knowledge of a downstream link which must be setup before data transfer may take place. However, the details of link setup may vary by the type of link (circuit-switched or other), specific hardware, or administrative differences. The DSLCP hides these details from the transport provider by offering a simple r...