Change default gateway on External Network

Greetings All,

vCloud 5.1.0

I have an External Network in vCD that is currently in use and I'd like to change default gateway but it is grayed out along with the network mask.

Since this network is being used by a direct network defined in OVDC and already in use by VMs, removing, readding the same network with new gw is not an option.

Does anybody know a way to change the gateway without removing external network? ... I wouldn't mind tapping into vCD database (running on MSSQL) if somebody could provide me with the table where gw is defined.

Thanks,

PD