Dynamic Path Selection
The CloudEOS and vEOS supports the Dynamic Path Selection that selects the path for the traffic to optimize application performance in the enterprise deployments.
The enterprise network sites like Data centers, Branches, Public Cloud (AWS VPC, Azure VNet, and others) are connected through multiple SPs (MPLS, Internet, LTE). Enterprises deploy edge routers to connect these sites over the SP WAN networks and in some cases building GRE or IPsec tunnels between sites. For high availability reasons, there are at least two WAN networks or paths available between sites.
In the above example there are 5 paths, 1 MPLS path and are four paths through ISPs: ISP1, ISP1-ISP3, ISP2-ISP3, ISP2-ISP1. Different ISP have different costs, bandwidth, WAN characteristics, SLAs, and so on. This is ideal for users wanting to use various SPs in a cost effective manner without sacrificing application performance. The traditional enterprises use MPLS VPNs which provides a very good WAN characteristics such as (latency, etc), but, at a very high costs. Internet has been gaining adoption as an alternative WAN to MPLS that offers much higher bandwidth at lower costs. Also, MPLS VPNs are not available in all geographies. While ISPs are more readily available and at a lower cost, however, maintaining application performance for traffic across sites is a big problem because ISPs don’t offer a good SLAs. The traditional routing solutions do not address the requirements to optimize routing across WAN SP networks.