We have six offices and only two of them have Internet reservation with BGP.
All branches have IPSEC Site-to-Site connection to the main office.
We want to make internet reservation channel in remaining four offices.
We can make it in two ways:
1. To take LIR status, PI addresses, AS and make BGP connection with two providers in every office. It is reliable but costs time and money.
2. To make internet reservation on PBR technology with switching to reserve internet provider if the first fails. But is it reliable anough? And can we make reliable ipsec site-to-site channel with reservation in this configuration?