VPN troubleshooting setup guide

[Ramprasad2]

can you share troubleshooting command
how to troubleshooting
1 if phase 1 tunnel not up
2 if phase 2 tunnel not up
3 when phase 1 and phase2 tunnel up but traffic not pass

can you share document link VPN troubleshooting guide step by step

[MHM Cisco World]

What ike ver. You run?

MHM

[Ramprasad2]

ike2

[MHM Cisco World]

we agree about you need to use policy based VPN between FTD and meraki. 
Now 

https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/115935-asa-ikev2-debugs.html

command to check PhaseI/II of IKEv2 in FTD same as that in ASA 

additional you can run 
packet tracer in FTD to see in which step the FTD drop packets 

in your OP you mention that IKEv2 is UP but traffic not pass so check two points here 
1- NAT exemption 
2- if you not use  sysopt connection permit-vpn then you need to add two ACP,
A- from IN -> OUT for traffic from Local to Remote LAN 
B- from OUT-> IN for traffic from Remote LAN to Local LAN 

MHM