Node-to-node ARP traffic does not work on OpenShift SDN

Solution Unverified - Updated -

Issue

  • Traffic from pods or tun0 interface of one node to pods and tun0 interface of a different node is dropped with Destination Host Unreachable error.
  • VXLAN traffic is properly allowed
  • Open vSwitch flows are correct
  • Capturing traffic on destination interface shows correct ARP packets arriving but not being answered

Environment

  • OpenShift Container Platform 3.x

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