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IPPM Metrics for Measuring Connectivity (RFC2498)

IP.com Disclosure Number: IPCOM000003079D
Original Publication Date: 1999-Jan-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 8 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Mahdavi: AUTHOR [+2]

Abstract

Connectivity is the basic stuff from which the Internet is made. Therefore, metrics determining whether pairs of hosts (IP addresses) can reach each other must form the base of a measurement suite. We define several such metrics, some of which serve mainly as building blocks for the others.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 17% of the total text.

Network Working Group J. Mahdavi

Request for Comments: 2498 Pittsburgh Supercomputing Center

Category: Experimental V. Paxson

Lawrence Berkeley National Laboratory

January 1999

IPPM Metrics for Measuring Connectivity

Status of this Memo

This memo defines an Experimental Protocol for the Internet

community. It does not specify an Internet standard of any kind.

Discussion and suggestions for improvement are requested.

Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1999). All Rights Reserved.

1. Introduction

Connectivity is the basic stuff from which the Internet is made.

Therefore, metrics determining whether pairs of hosts (IP addresses)

can reach each other must form the base of a measurement suite. We

define several such metrics, some of which serve mainly as building

blocks for the others.

This memo defines a series of metrics for connectivity between a pair

of Internet hosts. It builds on notions introduced and discussed in

RFC 2330, the IPPM framework document. The reader is assumed to be

familiar with that document.

The structure of the memo is as follows:

+ An analytic metric, called Type-P-Instantaneous-Unidirectional-

Connectivity, will be introduced to define one-way connectivity at

one moment in time.

+ Using this metric, another analytic metric, called Type-P-

Instantaneous-Bidirectional-Connectivity, will be introduced to

define two-way connectivity at one moment in time.

+ Using these metrics, corresponding one- and two-way analytic

metrics are defined for connectivity over an interval of time.

+ Using these metrics, an analytic metric, called Type-P1-P2-

Interval-Temporal-Connectivity, will be introduced to define a

useful notion of two-way connectivity between two hosts over an

interval of time.

+ Methodologies are then presented and discussed for estimating

Type-P1-P2-Interval-Temporal-Connectivity in a variety of

settings.

Careful definition of Type-P1-P2-Interval-Temporal-Connectivity and

the discussion of the metric and the methodologies for estimating it

are the two chief contributions of the memo.

2. Instantaneous One-way Connectivity

2.1. Metric Name:

Type-P-Instantaneous-Unidirectional-Connectivity

2.2. Metric Parameters:

+ Src, the IP address of a host

+ Dst, the IP address of a host

+ T, a time

2.3. Met...