If you look for a dual WAN router, chances are that you want the highest Internet reliability. For some companies, it is even a policy to avoid any single point of failure in their network, including the dual WAN or multi WAN router itself.
(Illustrations: Courtesy of PePLink)
VRRP (or Virtual Router Redundancy Protocol) is an industry standard designed to increase the availability of gateway devices (e.g. a dual WAN router) by allowing two or more of the same device to work in an active-backup fashion.
For your next purchase, look for a vendor who is focused on this area and is producing enterprise-class products.
(Illustrations: Courtesy of PePLink)
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