the 6200 series running version is R81.10 JHF 95 and 1500 series version is R81.10.05.
Both gateways are managed by separate management server. Both have running version is R81.20 JHF 10.
And 6200 series appliance are in cluster.
VTI interface topology.........
I created VTI 18. For cluster I assigned IP address.... VIP- 169.254.180.15, GW1- 169.254.180.11, GW2- 169.254.180.9
For SMB 1500 series VTI IP is 169.254.180.10
For testing purposes I run the command VPN TU TLIST and it shows NO outbound SA error.
I can't enter manually maybe it fetch automatically from the firewall.