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Toshiba's Flow Attribute Notification Protocol (FANP) Specification (RFC2129)

IP.com Disclosure Number: IPCOM000002683D
Original Publication Date: 1997-Apr-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 15 page(s) / 38K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Nagami: AUTHOR [+7]

Abstract

This memo discusses Flow Attribute Notification Protocol (FANP), which is a protocol between neighbor nodes for the management of cut-through packet forwarding functionalities. In cut-through packet forwarding, a router doesn't have to perform conventional IP packet processing for received packets. FANP indicates mapping information between a datalink connection and a packet flow to the neighbor node and helps a pair of nodes manage the mapping information. By using FANP, routers (e.g., CSR; Cell Switch Router) can forward incoming packets based on their datalink-level connection identifiers, bypassing usual IP packet processing. The design policy of the FANP is;

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group K. Nagami

Request for Comments: 2129 Y. Katsube

Category: Informational Y. Shobatake

A. Mogi

S. Matsuzawa

T. Jinmei

H. Esaki

Toshiba R&D Center

April 1997

Toshiba's Flow Attribute Notification Protocol (FANP) Specification

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

This memo discusses Flow Attribute Notification Protocol (FANP),

which is a protocol between neighbor nodes for the management of

cut-through packet forwarding functionalities. In cut-through packet

forwarding, a router doesn't have to perform conventional IP packet

processing for received packets. FANP indicates mapping information

between a datalink connection and a packet flow to the neighbor node

and helps a pair of nodes manage the mapping information. By using

FANP, routers (e.g., CSR; Cell Switch Router) can forward incoming

packets based on their datalink-level connection identifiers,

bypassing usual IP packet processing. The design policy of the FANP

is;

(1) soft-state cut-through path (Dedicated-VC) management

(2) protocol between neighbor nodes instead of end-to-end

(3) applicable to any connection oriented datalink platform

1. Background

Due to the scalability requirement, connection oriented (CO) datalink

platforms, e.g., ATM and Frame Relay, are going to be used as well as

connection less (CL) datalink platforms, e.g., Ethernet and FDDI.

One of the important features of the CO datalink is the presence of a

datalink-level connection identifier. In the CO datalink, we can

establish multiple virtual connections (VCs) with their VC

identifiers among the nodes. When we aggregate packets that have the

same direction (e.g., having the same destination IP address) into a

single VC, we can forward the packets in the VC without IP

processing. With this configuration, routers can decide which node

is the next-hop for the packets based on the VC identifier. CSRs [1]

can forward the incoming packets using an ATM switch engine bypassing

the conventio...