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36bf5cc66d
It doesn't make sense to output a tunnel packet using the same parameters that it was received with since that will generally just result in the packet going back to us. As a result, userspace assumes that the tunnel key is cleared when transitioning through the switch. In the majority of cases this doesn't matter since a packet is either going to a tunnel port (in which the key is overwritten with new values) or to a non-tunnel port (in which case the key is ignored). However, it's theoreticaly possible that userspace could rely on the documented behavior, so this corrects it. Signed-off-by: Jesse Gross <jesse@nicira.com>