Extra route not working and packet getting dropped at table 240

Extra route not working and packet getting dropped at table 240

1. Create Network,Subnet(ipv4 and Ipv6), Port and boot VM.
2. Create router and add IPv6 subnet to router
3. Update allowed pairs on particular port where Extra route will be configured.
4. Add extra route and ping from different VM.

Result:

      Packet getting dropped at table 240.