Network Working Group L. McLaughlin III
Request for Comments: 1088
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  (IP) datagrams on NetBIOS  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 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 
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 ) as well as within NetBIOS
datagrams allows these NetBIOS hosts to communicate with the Internet
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 ) is required.
Finally, when the IP support for a given NetBIOS host is
discontinued, a cancel command request should be submitted for every
pending receive datagram, and a delete name request should be
submitted for both the IP.XX.XX.XX.XX and IP.FF.FF.FF.FF address
added during initialization.
This document would not have been possible without the efforts of
John Bartas, James Davidson, and Dan Ladermann in the early design
and implementation of IP over NetBIOS.
 Postel, J., "Internet Protocol", RFC-791
, September 1981.
 IBM PC Network Technical Reference, Document Number 6322916,
 Mogul, J., and J. Postel, "Internet Standard Subnetting
, August 1985.
 Postel, J., and J. Reynolds, "A Standard for the Transmission
of IP datagrams over IEEE 802 Networks", RFC-1042
 Plummer, D., "An Ethernet Address Resolution Protocol", RFC-826
, November 1982.
Leo J. McLaughlin III
The Wollongong Group
1129 San antonio Road
Palo Alto, CA 94303
Phone: (415) 962-7100