Sniffing inbound ethernet frames only

[Jost-DVSB () t-online de]

Dear tcpdump experts,

I have a Linux box with two Fast Ethernet interfaces.
In two separate windows on the desktop I want to see
all inbound ethernet frames (from the wire), but not
the ethernet frames coming down the local network stack.
In the left window tcpdump should run to catch all
incoming ethernet frames from interface eth0.
In the right window tcpdump should run to catch all
incoming ethernet frames from interface eth1.
All outgoing ethernet frames must not be displayed.
Both tcpdump processes must run in parallel.

The keyword inbound cannot be used with link level.
Which tcpdump expression solves the problem?

Any solution appreciated.
jojo
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