Can I use all same IP-addresses for 2 active tunnels?

[jmaxwellUSAF]

Hello.

I am tasked with rebuilding a L2L VPN with better security. My boss suggested, for assurance reasons, I first erect a new VPN, test its success, then delete old VPN. 

QUESTION: Can I do this-- achieve both tunnels up and active, using all same IP addresses, but simply create a different tunnel-group name for the new tunnel?

Thank you.

[Rob Ingram · Accepted solution]

@jmaxwellUSAF I don't see how, there'd be nothing to distinguish between the 2 tunnels. Build in parallel, shutdown the existing tunnel and bring up the new tunnel. If that does not work roll back.