Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2000-Sep-13
Internet Society Requests For Comment (RFCs)
P. Droz: AUTHOR [+2]
Proxy-PAR is a minimal version of PAR (PNNI Augmented Routing) that gives ATM-attached devices the ability to interact with PNNI devices without the necessity to fully support PAR. Proxy-PAR is designed as a client/server interaction, of which the client side is much simpler than the server side to allow fast implementation and deployment.
Network Working Group P. Droz
Request for Comments: 2843 IBM
Category: Informational T. Przygienda
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright (C) The Internet Society (2000). All Rights Reserved.
Proxy-PAR is a minimal version of PAR (PNNI Augmented Routing) that
gives ATM-attached devices the ability to interact with PNNI devices
without the necessity to fully support PAR. Proxy-PAR is designed as
a client/server interaction, of which the client side is much simpler
than the server side to allow fast implementation and deployment.
The purpose of Proxy-PAR is to allow non-ATM devices to use the
flooding mechanisms provided by PNNI for registration and automatic
discovery of services offered by ATM attached devices. The first
version of PAR primarily addresses protocols available in IPv4. But
it also contains a generic interface to access the flooding of PNNI.
In addition, Proxy-PAR-capable servers provide filtering based on VPN
IDs , IP protocols and address prefixes. This enables, for
instance, routers in a certain VPN running OSPF to find OSPF
neighbors on the same subnet. The protocol is built using a
registration/query approach where devices can register their services
and query for services and protocols registered by other clients.
In June of 1996, the ATM Forum accepted the "Proxy-PAR contribution
as minimal subset of PAR" as a work item of the Routing and
Addressing (RA) working group, which was previously called the PNNI
working group . The PAR  specification provides a detailed
description of the protocol including state machines and packet
The intention of this document is to provide general information
about Proxy-PAR. For the detailed protocol description we refer the
reader to .
Proxy-PAR is a protocol that allows various ATM-attached devices (ATM
and non-ATM devices) to interact with PAR-capable switches to
exchange information about non-ATM services without executing PAR
themselves. The client side is much simpler in terms of
implementation complexity and memory requirements than a complete PAR
instance. This should allow an easy implementation on existing IP
devices such as IP routers. Additionally, clients can use Proxy-PAR
to register various non-ATM services and the protocols they support.
The protocol has deliberately been omitted from ILMI  because of
the complexity of PAR information passed in the protocol and the fact
that it is intended for the integ...