ikev2 DHCP address lease when disconnecting

[mrmcphisto]

Hi all,

we've a ike v2 running natively with the Microsoft client.

We use FAC to authenticate.

We are experiencing that when we disconnect the vpn from windows the IP address is then released even if we set on windows DHCP server as "infinite lease".

Is this a FGT sending release command problem? Or must be investigated M$ DHCP or client side?

Thanks