RFC 2107 (rfc2107) - Page 1 of 21
Ascend Tunnel Management Protocol - ATMP
Alternative Format: Original Text Document
Network Working Group K. Hamzeh
Request for Comments: 2107 Ascend Communications
Category: Informational February 1997
Ascend Tunnel Management Protocol - ATMP
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.
IESG Note:
This note documents a private protocol for tunnel management. This
protocol is NOT the product of an IETF working group nor is it a
standards track document. There is ongoing effort in an IETF working
group which could result in a standards track document which
specifies a protocol which provides similar functionality.
Abstract
This document specifies a generic tunnel management protocol that
allows remote dial-in users to access their home network as if they
were directly attached to the home network. The user's client
software uses an address contained in the home network address space
for the remote access. Packets to and from the home network are
tunneled by the Network Access Server (NAS) to which the user
connects and a Home Agent (HA) on the user's home network. This
allows for the support of access to Virtual Private Networks and also
allows for the use of protocols other than IP to be carried over the
tunnel. An example of how the RADIUS (Remote Authentication Dial In
User Service) can be used to provide the necessary configuration
information to support this service is also provided.
1. Introduction
The Ascend Tunnel Management Protocol (ATMP) is a protocol currently
being used in Ascend Communication products to allow dial-in client
software to obtain virtual presence on a user's home network from
remote locations. A user calls into a remote NAS but, instead of
using an address belonging to a network directly supported by the
NAS, the client software uses an address belonging to the user's
"Home Network". This address can be either provided by the client
software or assigned from a pool of addresses from the Home Network
address space. In either case, this address belongs to the Home
Network and therefore special routing considerations are required in
Hamzeh Informational