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PPP Internet Protocol Control Protocol Extensions for Name Server Addresses (RFC1877)

IP.com Disclosure Number: IPCOM000004133D
Original Publication Date: 1995-Dec-01
Included in the Prior Art Database: 2019-Feb-12
Document File: 6 page(s) / 7K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Cobb: AUTHOR

Related Documents

10.17487/RFC1877: DOI

Abstract

This document extends the NCP for establishing and configuring the Internet Protocol over PPP [2], defining the negotiation of primary and secondary Domain Name System (DNS) [3] and NetBIOS Name Server (NBNS) [4] addresses. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 33% of the total text.

Network Working Group S. Cobb Request for Comments: 1877 Microsoft Category: Informational December 1995

PPP Internet Protocol Control Protocol Extensions for Name Server Addresses

Status of this Memo

This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Abstract

The Point-to-Point Protocol (PPP) [1] provides a standard method for transporting multi-protocol datagrams over point-to-point links. PPP defines an extensible Link Control Protocol and a family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.

This document extends the NCP for establishing and configuring the Internet Protocol over PPP [2], defining the negotiation of primary and secondary Domain Name System (DNS) [3] and NetBIOS Name Server (NBNS) [4] addresses.

Table of Contents

1. Additional IPCP Configuration options ................. 1 1.1 Primary DNS Server Address .................... 2 1.2 Primary NBNS Server Address ................... 3 1.3 Secondary DNS Server Address .................. 4 1.4 Secondary NBNS Server Address ................. 5 REFRENCES .................................................... 6 SECURITY CONSIDERATIONS ...................................... 6 CHAIR’S ADDRESS .............................................. 6 AUTHOR’S ADDRESS ............................................. 6

1. Additional IPCP Configuration Options

The four name server address configuration options, 129 to 132, provide a method of obtaining the addresses of Domain Name System (DNS) servers and (NetBIOS Name Server (NBNS) nodes on the remote network.

Cobb Informational [Page 1]

RFC 1877 PPP IPCP Extensions December 1995

Primary and secondary addresses are negotiated independently. They serve identical purposes, except that when both are present an attempt SHOULD be made to resolve names using the primary address before using the secondary address.

For implementational convenience, these options are designed to be identical in format and behavior to option 3 (IP-Address) which is already present in most IPCP implementations.

Since the usefulness of name server address information is dependent on the topology of the remote network and local peer’s application, it is suggested that these options not be included in the list of "IPCP Recommended Options".

1.1. Primary DNS Server Address

Description

This Configuration Option defines a method for negotiating with the remote peer the address of the primary DNS server to be used on the local end of the link. If local peer requests an invalid server address (which it will typically do intentionally) the remote peer specifies the address by NAKing this option, and returning the IP address of a valid DNS server.

By default, no primary DNS address is provided.

A summary of the Primary DNS Address Configuration Option format is shown below. The fields are transmitted from left to right.

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