WAN Monitoring at SLAC

Internet Monitoring at SLAC

Les Cottrell and Warren Matthews, October 22, 2000

Central Computer Access | Computer Networking | Network Group | ICFA-NTF Monitoring

Page Contents

Introduction - ESnet NMTF, ICFA NTF-WG, MICS IEPM, PingER tools, SLAC, Tutorial, XIWT.
Monitoring HENP & ESnet Sites Performance Graphs, Pinger detail and summary reports, Sites: BaBar, Beacon, Monitoring, Remote and requirements.
Pinging of SF Bay Area ISPs
Pinging of SLAC Collaborators
Non-ping Internet Monitoring
Sites with traceroute Servers
Further Information

PingER Summary Reports | PingER Detail Reports | PingER Tools | PingER Help | Tutorial

Index of Links on this Page

Introduction

In order to provide a better expectation of the network performance between sites that SLAC collaborates with, some of the major BaBar sites started monitoring the response time (by using the IP Ping facility). In 1995 this work was extended by the ESnet Network Monitoring Task Force (NMTF) to cover ESnet needs. In April 1997 the work was further extended with the creation of an ICFA-NTF Monitoring Working Group at the request of the International Committee on Future Accelerators (ICFA) to cover the needs of the High Energy and Nuclear Physics (HENP) community. In 1998 the Cross Industry Working Team (XIWT) adopted the PingER tools developed out of the above efforts and used them to monitor their member sites.

For more information on the monitoring techniques see the Tutorial on Internet Monitoring at SLAC. Some of this work is funded by a DOE/MICS Field Work Grant for Internet End-to-end Performance Monitoring (IEPM).

Monitoring HENP & ESnet Sites

Ping response and packet loss information is available from several ICFA Monitoring sites, each of which is monitoring many Remote sites (see Requirements for WAN Hosts being monitored for more on how remote hosts are selected). There is also a set of Beacon sites that all monitoring sites monitor. For more information on this monitoring see the Report of the ICFA-NTF Monitoring Working Group. Details of the tools, collectively known as PingER, are described in and available via PingER Tools from the ICFA-NTF WG on Monitoring.

Long term (going back for many months) PingER History information is available as:
- PingER detail reports for tables of hundreds of remote sites seen from multiple monitoring/collection sites and going back for many months.
- PingER summary reports for tables of ping metrics by groups of sites for specified month (default is the most recently completed month).

Short term (last day or so) information is available in two forms:

Connectivity Status provides tabular information for the most recent measurements.
Plots of recent ping response & packet loss time series and frequency distributions for selected sites (selection is made via a form).

Tables of Latest Offsite Node Connectivity seen from:

Plots of response & packet loss seen from:

DESY

TRIUMF

External Router Traffic

ARM

NBI

SLAC

Traceroute to Beacon sites

* page is only visible at SLAC, + requires password.

AMP RTT/Routes for SLAC. Surveyor one way delay, loss & routes.
You can Generate Ping Network Performance Graphs for selected monitoring site/remote site pairs within selected intervals.
Monitoring Activities at HENP & ESnet Sites provides pointers to other HENP & ESnet network monitoring.

Pinging of SF Bay ISPs

SLAC supports Residential Services to let you connect your computer from home to the SLAC network. To assist in trouble shooting and setting expectations we monitor the performance to selected routers at ISPs and in people's homes.

Pinging of SLAC Collaborators' Nodes

List of all sites pinged by the HENP/ESnet monitoring sites, and a list of Beacon sites.
Requirements for WAN Hosts being Monitored.
Definition of Beacon sites.
Ping response time and FTP rates between SLAC and off-site nodes Dec-94 and Sep-95.
Daily Service Predictability of remote nodes measured from SLAC.

July 1995 March 1996

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See also the Monthly Service Predictability comparisons for several N. American and International sites seen from SLAC, for 1995 and 1996.

July 1995	March 1996
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Other (non-ping) Internet Monitoring

Monitor the SLAC Internet gateways to get an idea of utilization.

Further Information

Internet Monitoring Sites of Interest

This link has moved to:
http://www.slac.stanford.edu/comp/net/wan-mon/netmon.html.

Network Organizations of Interest

This link has moved to:

http://www.slac.stanford.edu/comp/net/netorg.html.

Number of Hosts on the Internet

Real time estimate and plot of the number of hosts on the Internet.

Internet Service Providers (ISPs)

Atlas of Cyberspace: Maps of ISPs and Internet Backbone Networks.
BARRNET (Bay Area Regional Research Network).
BBN Techwatch magazine.
Boardwatch magazine: The Boardwatch Magazine provdes a Guide to the Internet.
DANTE (Delivering Academic Networks to Europe).
Data Communications ISP index.
Ebone is a major pan-European Backbone connecting over 60 regional networks in more than 25 countries to the Global Internet.
ESnet (Energy Sciences Network).
Palo Alto Cable Modem Service: Commercial cable modem service is now available to residents and businesses within Palo Alto Cable Co-op's service area,
Russ Haynal's ISP Page: This page is also useful to anyone interested in the major ISP's, and how they inter-connect.
Russell Kroll's Internet Network Maps
WinterLAN a Bay Area ISDN Local ISP.

Review of Domestic ISPs

by Network Computing Magazine, June 1, 1996. This is an in-depth studies of seven domestic Internet Service Providers (ISPs).

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