Ethereal-users: Re: [Ethereal-users] Ethereal, dual nic and shomiti tap

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From: Guy Harris <guy@xxxxxxxxxx>
Date: Thu, 22 Feb 2001 16:30:51 -0800 (PST)
> - dual NIC 10/100 PCMCIA cards
> - Linux OS (2.17)
> - latest and greates ethereal
> - Shomiti century tap
> - Cabletron switch with auto-negotiation enabled, 100 Mb full 
> duplex (I know ... should stick with 100MB half+fixed - but the 
> mainframe card I have is not capable of fixed speed ... )

> - trying to monitor traffic on both directions

I assume by "on both directions" you mean "on both interfaces on the
machine".

> - can't see one or the 
> other (stopping one of the ethereal "sessions" for either one of the 
> cards allows the other to "see" traffic) 

Try it with tcpdump.  If that has the same problem, it's most likely to
be an issue of the Linux kernel/drivers or of the hardware, or, *much*
less likely, a libpcap issue.