Router functionality fails in Netvirt VPN Service

Setup:
An ODL controller
A control and compute node

Procedure:
1. Install the VPN Service opensatck feature.
feature:install odl-netvirt-openstack
2. Stack the control and compute node.
3. Create two networks.
4. Create 2VM instances for each Network on control node and compute node.
5. Create router between two network.
6. Ping fails between two VMs.