This needs the docs to be updated to clarify how to set up the OVS on the ramp node in: https://github.com/openshift/openshift-docs/blob/master/install_config/routing_from_edge_lb.adoc This must be fixed before 3.2 ships, but is not a code blocker.
PR for this is: https://github.com/openshift/openshift-docs/pull/1934
After modify the rules according to the PR, this works well.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2016:1064