On Thu, Jan 03, 2002 at 01:18:56PM +0000, Ganesh Sittampalam wrote:

> > Having TCP/IP or not is probably not the problem.  If W2K answers ARP
> > requests on this interface you're still fscked.
> 
> True. But I'd have thought disabling TCP/IP should disable ARP too. If the 
> interface was configured, it'd also have a different IP

Some OSes (including linux by default, I think) answer ARP requests for
local IP addresses even on interfaces that don't carry them.


> I've come up with a possible theory for what could be happening, but my
> knowledge of precisely how ethernet works is a bit thin. Is it usual for
> ethernet cards to echo packets sent by the machine they are in back to
> that same machine?

No.  In fact, it'd be a bug, although a normal stack should be able to
deal with it.


> If the answer is no, then it could be caused by the
> VMWare "bridging" (I'll call it slaving from now on to avoid confusion).  
> Recall that the external ethernet interface on rocky is actually slaved to
> sandy's external ethernet interface. Suppose the slaving decides which
> frames to send to rocky by looking at the source MAC address; if it's the
> MAC address of the slave device then it doesn't send them, and if it isn't
> it does.

I don't really see how this would work?  Can you elaborate on this a bit?


cheers,
Lennert
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