[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference 7.286::fddi

Title:FDDI - The Next Generation
Moderator:NETCAD::STEFANI
Created:Thu Apr 27 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2259
Total number of notes:8590

142.0. "Concentrator & Etherfind" by DENVER::SANDOVAL () Wed Sep 26 1990 11:46

    Question:
    
    		I'm having a problem when I run etherfind from the Sun
    		on our FDDI network.  It causes the concentrator to go
    		south and it ends up resetting itself, sometimes
    		continuously.  If I run etherfind from the Sun seperated
    		completely from the concentrator everything seems to 
    		work reasonably well.  In other words if the Sun is 
    		connected directly on the concentrator, bad things 
    		happen.
    
    Anybody
    
    eric()
    
T.RTitleUserPersonal
Name
DateLines
142.1what is it?KONING::KONINGNI1D @FN42eqWed Sep 26 1990 13:424
For those who aren't familiar with it, could you explain what "etherfind"
does?

	paul
142.2monitor/packageDENVER::SANDOVALWed Sep 26 1990 14:052
    Etherfind is like a HP-LAN Analyzer it monitors raw packets or
    	it can filter packets as well.  
142.3KONING::KONINGNI1D @FN42eqWed Sep 26 1990 16:336
Now I'm REALLY confused.  If it MONITORS, how can it affect any other node
on the net?  It sounds like it also sends things.  In principle, nothing
any station can send should take down a concentrator, but there may be
cases that slipped through the cracks.

	paul
142.4Got any more information?LEVERS::CIARFELLASaabless and happyThu Sep 27 1990 10:2519
    
    When etherfind monitors the network, does it monitor the whole network,
    ie., promiscuously receive all frames on the ring or do you program
    it to listen to specific addresses?
    
    Does etherfind transmit anything, ie., flood the network with arp
    requests or anything like that?
    
    The location of the etherfind node on the ring should be transparent to
    the concentrator.  It should not make any difference whether the two
    boxes are directly connected or not.  I assume that the etherfind is
    running on a Sun workstation and that the problem occurs when you
    connect the B port of the Sun to one of the M ports on the con,
    correct?
    
    How long does it take for the concentrator to become disabled after
    you connect the Sun box to it?
    
    Paul C
142.5VAXRT::GENTRYSubtle operational change (read bug)Thu Sep 17 1992 02:577
	Keep in mind a concentrator can have a network management
	module.  Is it possible that the software is sending management
	commands?  (I wouldn't think so if it is a program that
	monitors the net)

					Megan