all VpnPortIpToPort entries (including configuration ones) are lost from ODL cache after reboot

trying to ping a vm in a different network, but the vm doesn't receive arp response for the gw interface.
in karaf.log we see that arp requests are received by the odl:
rpNotification Request Received from interface bb156e2a-aef6-4aa1-8f0f-cecf4ae86454 and IP 8.0.0.5 having MAC FA:16:3E:BA:81:C1 target destination 8.0.0.1

in the neutronvpn:neutron-vpn-portip-port-data model, we don't see an entry for the router interface.

i suspect that an ODL restart performed yesterday caused that.

WO: remove and re-add router interfaces.