This bug has been copied from bug #582367 and has been proposed
to be backported to 5.5 z-stream (EUS).
You should be able to force LRO off for various drivers by adding them to a bridge interface. Detecting if it works will ususaly require you to look in the message log for various informational driver messages about lro being disabled.
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Large-Receive Offload (LRO) is a performance optimization that enables the kernel to fetch and process, as a unit, more than one received packet from a network device. It was previously not possible to dynamically disable LRO for devices in a forwanding mode. This has been fixed with this update so that the kernel is able to dynamically disable LRO for devices in a forwarding state, or which had had LRO turned on manually.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.