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Standard for the transmission of IP datagrams over NetBIOS networks (RFC1088) Disclosure Number: IPCOM000001897D
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 3 page(s) / 5K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

L.J. McLaughlin: AUTHOR


The goal of this specification is to allow compatible and interoperable implementations for transmitting IP datagrams over NetBIOS networks.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 52% of the total text.

Network Working Group L. McLaughlin III

Request for Comments: 1088 TWG

February 1989

A Standard for the Transmission of IP Datagrams over NetBIOS Networks

Status of this Memo

This document specifies a standard method of encapsulating the

Internet Protocol [1] (IP) datagrams on NetBIOS [2] networks.

Distribution of this memo is unlimited.


The goal of this specification is to allow compatible and

interoperable implementations for transmitting IP datagrams over

NetBIOS networks.

NetBIOS is a standard which specifies a means of creating virtual

circuits and of transmitting and receiving point-to-point, multicast,

and broadcast datagrams. This specification uses only the datagram


Previous versions of this memo specified the use of the NetBIOS

broadcast datagram services instead of the NetBIOS group name

services to implement IP broadcasting. These versions are now



NetBIOS networks may be used to support IP networks and subnets [3]

of any class. By means of encapsulating IP datagrams within NetBIOS

datagrams and assigning IP numbers to the hosts on a NetBIOS network,

IP-based applications are supported on these hosts. The addition of

a router capable of encapsulating IP packets within ordinary data-

link protocols (such as 802.3 [4]) as well as within NetBIOS

datagrams allows these NetBIOS hosts to communicate with the Internet

at large.

Address Mappings

In general, NetBIOS names may be any series of 16 bytes, however, a

few values are reserved or used by common networking packages.

NetBIOS names for the IP applications on each host are chosen on the

basis of the internet number of that host. Since NetBIOS names are a

mapping of IP addresses, no physical address query mechanism (e.g.,

ARP [5]) is required.

For these internet protocol applications, IP.XX.XX.XX.XX is the

NetBIOS name for any IP over NetBIOS host where XX represents the

ascii hexadecimal representation of that byte of the internet


This addressing scheme allows for the multiplexing of standard

datagram protocols over NetBIOS as well as easy visual confirmation

of the correctness of a given packet's address.

Broadcast and Multicast Addresses

Broadcast Internet addresses are represented by the NetBIOS group

name IP.FF.FF.FF.FF. Currently, no attempt is made to provide

support of IP multicast addresses using NetBIOS group names.

Maximum Transmission Unit

The maximu...