ping6 is failing between VMS with OVS2.6 + DPDK

Followed the below steps on openstack controller to configure IPV6

1.Created the network
2.Created the subnet for ipv6 : 2001:db8:1234::/64 with slaac mode
3.Associated subnet to router
4.Launch the VM in dashboard
5.ping6 between same VMs and its failing

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cookie=0x6900000, duration=1350.413s, table=40, n_packets=0, n_bytes=0, priority=61010,ipv6,dl_src=fa:16:3e:59:12:09,ipv6_src=2001:db8:1234:0:f816:3eff:fe59:1209 actions=ct(table=41,zone=6001)
cookie=0x6900000, duration=2315.477s, table=41, n_packets=0, n_bytes=0, priority=62020,ct_state=-new+est-rel-inv+trk actions=resubmit(,17)
cookie=0x6900000, duration=2315.475s, table=41, n_packets=0, n_bytes=0, priority=62020,ct_state=-new-est+rel-inv+trk actions=resubmit(,17)

cookie=0x6900000, duration=2315.476s, table=41, n_packets=390, n_bytes=33540, priority=62020,ct_state=+inv+trk actions=drop

cookie=0x6900000, duration=1367.535s, table=41, n_packets=0, n_bytes=0, priority=12802,ct_state=+new+trk,ip,metadata=0x33350000000000/0x1fffff0000000000 actions=ct(commit,zone=6001),resubmit(,17)
cookie=0x6900000, duration=1367.142s, table=41, n_packets=0, n_bytes=0, priority=12802,ct_state=+new+trk,ipv6,metadata=0x33350000000000/0x1fffff0000000000 actions=ct(commit,zone=6001),resubmit(,17)
cookie=0x6900000, duration=1349.804s, table=41, n_packets=0, n_bytes=0, priority=12802,ct_state=+new+trk,ip,metadata=0x33360000000000/0x1fffff0000000000 actions=ct(commit,zone=6001),resubmit(,17)
cookie=0x6900000, duration=1349.345s, table=41, n_packets=0, n_bytes=0, priority=12802,ct_state=+new+trk,ipv6,metadata=0x33360000000000/0x1fffff0000000000 actions=ct(commit,zone=6001),resubmit(,17)
cookie=0x6900000, duration=2315.476s, table=41, n_packets=0, n_bytes=0, priority=50,ct_state=+new+trk actions=drop
cookie=0x6900000, duration=2315.474s, table=41, n_packets=0, n_bytes=0, priority=0 actions=drop