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Random Network Disconnects 500 node HP ProCurve network

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Last Modified: 2013-12-07
I manage a 2003 Server network with 500 nodes.  I run HP ProCurve switches and use a SonicWall Pro2040.  I have about 300 wireless users.  We have been experiencing random network drops from  servers (file, mail and Oracle DB) for the past 5 months.  I have replaced NICs, cables, switches, servers, updated OS, updated firmware,  drivers, tested cables, spoken with tier 3 HP tech support and envolved nearly a dozen network engineers, and various support folk.  I have entertained ideas ranging from EMF given off by thermostats and HVAC units to ethernet loops caused by bleeding wireless signals.  I'm baffled and need help.

Thanks in advance!
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Is there any pattern in the problems? weekday? hour of day?
- pure random or related to network use?
For how long a period of time pr.incident?

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Is it both the wireless and wired hosts?

Author

Commented:
Sorry- I screwed up the response.  

Is there any pattern in the problems? weekday? hour of day?  no, purely random
- pure random or related to network use?  not related to use.  1-2% of ping packets are dropped to both DB server, file server and mail server
For how long a period of time pr.incident?  Only for an instant but long enough for client to lose connectivity to above resources

Author

Commented:
Is it both the wireless and wired hosts?

Yes- the wireless hosts tend to be more flaky than the wired.
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