The PPP DECnet Phase IV Control Protocol (DNCP) (RFC1762)
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2019-Feb-12
Internet Society Requests For Comment (RFCs)
This document defines the NCP for establishing and configuring Digital's DNA Phase IV Routing protocol (DECnet Phase IV) over PPP. This document applies only to DNA Phase IV Routing messages (both data and control), and not to other DNA Phase IV protocols (MOP, LAT, etc). [STANDARDS-TRACK]
Network Working Group S. Senum Request for Comments: 1762 DigiBoard Obsoletes: 1376 March 1995 Category: Standards Track
The PPP DECnet Phase IV Control Protocol (DNCP)
Status of this Memo
This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.
The Point-to-Point Protocol (PPP)  provides a standard method of encapsulating Network Layer protocol information over point-to-point links. PPP also defines an extensible Link Control Protocol, and proposes a family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.
This document defines the NCP for establishing and configuring Digital’s DNA Phase IV Routing protocol (DECnet Phase IV) over PPP. This document applies only to DNA Phase IV Routing messages (both data and control), and not to other DNA Phase IV protocols (MOP, LAT, etc).
There are two basic approaches to running the DNA Phase IV Routing protocol over a serial line:
1. The approach that several router vendors have taken which is to treat the serial link as an Ethernet, using the same data and control messages an Ethernet would use.
2. The approach defined by Digital, which uses DDCMP and slightly different control messages.
This document will define a method that uses the first approach.
Senum [Page 1]
RFC 1762 PPP DNCP March 1995
2. Overview Of Phase IV DNA Protocols
The Phase IV DNA protocols which act as data link clients are:
o DNA Phase IV Routing The Phase IV Digital Network Architecture (DNA) Routing protocol is a network layer protocol providing services similar to that of DoD IP. It routes messages in Phase IV DECnet networks and manages the packet flow. The complete definition of the DNA Phase IV Routing protocol can be found in .
o DNA System Console The Digital Network Architecture (DNA) System Console protocol is a maintenance protocol providing low level access to a system for the functions of:
. Identify processor . Read data link counters . Boot system . Console carrier (a general purpose i/o channel)
The complete definition of the DNA System Console protocol can be found in .
o Digital Customer Use The Digital Customer Use protocol is a value reserved for use by Digital customers. It allocates a type for private use which will not conflict with Digital or other vendor protocols.
o DNA Diagnostics The Digital Network Architecture (DNA) Diagnostics protocol is reserved to allow diagnostic software communications in parallel with other data link clients.
o DNA Naming Service (DNS) The Digital Network Architecture Naming Service (DNS) provides a distributed naming service. It allows clients to register named objects and to bind a set of attributes to the objects in a...