DataPath not working with IPV6 and packet getting dropped at Table 213

Steps:

1. Create Network,Subnet(SLAAC),Port.
2. Create Router and associate subnet to it
3. Boot VM and check IPV6 address assigned.(If not assigned, then reboot the VM)
4. Verify data path.

Observation:

      Ping fails with IPV6. To confirm, same testing has been performed with IPV4 and it was working as expected.

Configuration:

neutron net-create mynet1

neutron subnet-create mynet1 2001:db8:1234::/64 --ip-version 6 --ipv6-ra-mode slaac --ipv6-address-mode slaac --name net1-snet2
neutron port-create mynet1 --name myport12 --security-group=CUSTM_SGP
neutron port-create mynet1 --name myport22 --security-group=CUSTM_SGP
neutron port-create mynet1 --name myport13 --security-group=CUSTM_SGP
neutron port-create mynet1 --name myport23 --security-group=CUSTM_SGP
nova boot --image cirros-0.4.0-x86_64-uec --flavor m1.tiny --nic port-id=$(neutron port-list | grep 'myport12' | awk '{print $2}') myhost12 --availability-zone nova:rajarajan-14
nova boot --image cirros-0.4.0-x86_64-uec --flavor m1.tiny --nic port-id=$(neutron port-list | grep 'myport22' | awk '{print $2}') myhost22 --availability-zone nova:rajarajan-15
nova boot --image cirros-0.4.0-x86_64-uec --flavor m1.tiny --nic port-id=$(neutron port-list | grep 'myport13' | awk '{print $2}') myhost13 --availability-zone nova:rajarajan-14
nova boot --image cirros-0.4.0-x86_64-uec --flavor m1.tiny --nic port-id=$(neutron port-list | grep 'myport23' | awk '{print $2}') myhost23 --availability-zone nova:rajarajan-15
neutron router-create R1
neutron router-interface-add R1 net1-snet2