[lug] Can a Hub go bad?

[Jeff Howell]

Another simple diagnostic is to run ifconfig -a and look for errors in 
the output. If a wire or hub is bad you will see lots of frame, rx or tx 
errors.

John Hernandez wrote:

> Tim, this could be many things.  A broadcast storm of some type, or even a DOS attack.  Tcpdump should be able to decode all the Ethernet frames on the wire for you.  The name is misleading, since it's really a rudimentary (and very useful) sniffer that puts your interface in promiscuous mode and reports to you what's on the wire (not just TCP traffic).  You can try 'ip proto udp', or 'ether broadcast'.  Ethereal is a more user-friendly sniffer.  You should be able to determine the source and type of the offending packets using these tools.  I've seen hubs and switches go haywire before, generating lots of noise on the wire.
> 
> I'd be curious to hear what you find.
> 
> -John
> 
> Tim Klein wrote:
> 


-- 
  Jeff Howell
  EDS Unix Support

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