hemants thank you for reply,
I am sorry that I was not so clear. Here is the reply to your questions
#Both ends are vSRX and have public IP addresses which they take it through pp0.0 in order to communicate to the internet. Imagine, the one line has VDSL modem/router and the other ADSL modem/router.
#I guess you suggesting to ping google ip address in order to check this
#Yes you are correct...I get dynamic IPs from that interface (PPPoE)
#According to this question:
Does the other wend also have a dynamic ip, if yes the vpn tunnel is not possible as one of the end has to havea static ip.
//Why? You can check your public IP address and use it as static.. ?!
#There is not traffic between them...not even in phase 1