Traffic between peers is blocked when a policy is configured with acceleration enabled on it, As soon as acceleration is disabled peers are able to establish connection and communicates normally ( CIFS,SMB etc)
You will see following logs
Apr 7 16:25:20 tcpad: TID 139986895324928: [tcpad.WARNING]: Error in preaccept (connecting 192.168.31.155:63115 to 192.168.51.100:445: Network is unreachable)
Apr 7 16:26:12 tcpad: TID 139986903717632: [tcpad.WARNING]: Error in preaccept (connecting 192.168.31.155:63125 to 192.168.51.100:445: Network is unreachable)
-- Logs suggested client exinda was not able to route to destination exinda, check default-geteway on both exinda and both or any one of them would be incorrect. Changed it to correct defaul-gateway IP and acceleration will start working.
If after configuring proper default gateway traffic is hitting correct policy but you are not seeing yellow strip of acceleration then follow article 000001303 to troubleshoot.