Ethereal-users: RE: [Ethereal-users] Intermittent Network Fault - Newbie ProtocolAnalyser Help

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From: "Andersen Jens Elmo" <jens.elmo.andersen@xxxxxxxxxxx>
Date: Thu, 10 Nov 2005 15:58:10 +0100
Hi,
 
I would not expect you to be able to see much with ethereal.
If the switch just stops forwarding data on the network, you would see nothing in the trace.
 
Is it only the uplink that blocks or is connectivity lost between all ports on the switch ?
If all ports ar blocked, you probably have an internal fault in the switch.
 
Regards
 
Jens Elmo 
 
 
From: ethereal-users-bounces@xxxxxxxxxxxx [mailto:ethereal-users-bounces@xxxxxxxxxxxx] On Behalf Of Brett Charlton
Sent: 10. november 2005 14:54
To: ethereal-users@xxxxxxxxxxxx
Subject: [Ethereal-users] Intermittent Network Fault - Newbie ProtocolAnalyser Help

Hi there
 
Hope some kind soul out there can help or point me in the right direction.
 
For the last month or so our users have experienced a network failure about once per week.  Rebooting the main 48 port unmanaged switch (netgear) resolves the problem.
 
I would like to inspect what's going on at the switch to try and get to the bottom of the failure.  I've downloaded and installed ethereal, however, I have no idea what I should be looking for in the log files.  Can anyone help?
 
At present we have our W2K servers running on a copper gigabit switch, this switch is then connected to the 48 port switch.  Various other switches are downstream of this switch.
 
I plan on hanging a hub between a downstream switch and its uplink to the 48 port switch and then using ethereal to analyse what's happening.
 
However, I've no idea what I should be looking for!  Can anyone help please??
 
Thanks
 
BC

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