WAN link Redundancy in VSX

[Trinickrs]

A customer has a R77.30 VSX environment with one of its virtual system connected to a VPN via WAN link to a remote site.

The customer would like to have a Redundant WAN link connected. However  with VSX limitations ISP Redundancy and VTI are not supported. Do you know of any other VSX solution  of connecting a 2nd WAN link to the environment?

Note: The customer's environment will be upgraded to a higher version soon, however the VSX limitations remain. 

[PhoneBoy]

Once you upgrade to a newer release, you should have options with PBR and/or route monitoring.

[Trinickrs]

Thanks for the feedback PhoneBoy.

However, I'm was looking for an immediate solution to have the redundant WAN link in the environment.  Since the customer can't give any maintenance window at this time. 

[Chris_Atkinson]

What is the current physical topology and have you explored solutions external to the cluster itself?

R77.30 is long out of support and a risk, some would argue this is worse than the proposed controlled downtime.

VTI is supported with VSX on R81 and above.

[PhoneBoy]

As far as I know, there isn't really a way to achieve this under R77.30. 
Your best bet is to upgrade to a supported version where other options exist.