Multiple VPN links

Hi,

I have a site to site VPN running between some SRX devices. Looking at adding another site to site vpn to a new device as a failover for this link.

If the primary site to site vpn fails, I want it to failover to the other site automatically. When the primary link returns, I want it to switch back automatically also.

I’m thinking if I get these VPN links in, use OSPF and set one link with a higher metric which is the backup link?

What do you think?

Thanks