Strange network (?) problems

[David Tonhofer]

Chris St. Pierre wrote:
> I have recently been experiencing a very strange problem with a number
> of different RHEL 4 boxes providing a number of different services.
> Basically, it appears that packets are occasionally delayed or
> dropped, apparently randomly.
>
[...]

DO the machines all have the same network hardware?
Is there anything useful in the kernel log about a misbehaving driver?