I have an existing network consisting of 1x Cisco ASA 5512-x firewall, a Cisco Catalyst 3560 (w/ ip services image), and a few Cisco Catalyst 2960 switches.
I have one existing 60mb fiber internet connection and just recently added a second 100mb fiber from a different provider.
I also have a spare Cisco ASA 5510 and Cisco 1921 router on tap.
I want to be able to load balance and direct incoming/outgoing traffic between the two ISPs but I need guidance on what the proper topology setup should be to give me full control while adhering to best practices.
Some of the configurations I want to achieve are:
1) load balance incoming traffic between the two separate ISPs for published connections, i.e. voip, smtp, and web
2) load balance and redundancy for outbound internet traffic for LAN users
3) direct specific devices and protocols to either ISP service
Off the top of my head, I'm assuming the proper setup would be to have both ISPs connected to a Cisco router, followed by the ASA 5512-x firewall, then the network, per below diagram: