Quick Guide to SLAC's Networking Reports and Data - Overview

Connie Logg and Les Cottrell. Last update: October 13, 1995

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For security reasons, access to many parts has been blocked for the outside world (such pages are identified by an asterisk).

There are various thresholds applied to the daily data analysis and reduction for the extraction of "alertable" situations.

For a QUICK REVIEW of yesterday's happenings and data analysis and reduction see:

The netnews group slac.computing.outages gives a list of scheduled outages.

The HOT Plates* are from the most recent H.O.T. meeting.

The network maps* provide skeleton maps of the network layout.


The configuration information of the following network devices is read out of the devices once a day.

  • A list of servers and their functions.


    Network Monitoring Data Collection and Analysis Diagnostics

    Compilation of various error logs and diagnostic logs generated by the data collection and analysis. If something does not run, useful information may be found here.[NEW]

    ETHERMETERS are the primary instrument for measuring ethernet traffic and errors on networks at SLAC. The following are the tablular reports and graphs which are updated hourly for today's data and daily for the rest.


    We collect data hourly from the NAT bridges interfaces in the network.


    We collect data hourly from the CISCO router interfaces in the network.



    Interface statistics data collection has been implemented for SNMP'able multi-port repeaters and structured wiring hibs..

    CATALYST - not currently available

    Preliminary data collection has been implemented for test catalyst.


    This section provides tabular reports and graphs of long term traffic trends extracted from the daily performance monitoring data.

    ARA -

    Data collection has been implemented for the Shiva ARA servers LANROVER1 and LANROVERPLUS1. The Maximum Simultaneous Users [NEW] graphs are useful for trouble-shooting and planning. The raw interface stats data* are also available. Note: in the data file the first column is the time of the sample, the second column is the number of ports in use, and the suceeding columns are the states of the ports 1->n. A value of 1 means that a port is in use, 2 means that a port is not in use. If a port shows to never be in use, this may mean that there is a problem with it.


    Data is collected twice hourly from the Gigaswitch. Only the raw data is available for viewing at this time.



    Various nodes on the network are pinged periodically to sample for packet loss and response time.

    More information is available on SLAC's networks including trends, presentations, acknowledgements, and additional documentation.

    Footnote: * indicates that access to the page is only accessible from SLAC nodes.
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