Our Perimeter Firewall-Cluster is connected to the Internet via Provider 1 using Provider-Assigned Public IP Addresses.
In the future, we will use our own PI-Range to connect to the Internet via BGP-attached Provider2 and Provider3.
The migration phase will last 2 years. During that time, the Firewall Cluster must be able to handle both the "old" PA-Range and the "new" PI-Range. Basically, the Firewall should provide Source based Routing for the packets leaving its external linterfaces. How good will fit the ISP-redundancy feature here. Arer there any other options to achieve our goal?
