Airheads Tech Talks: SD-WAN-Health Check and Dynamic Path Selection

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Presented by

Rajesh P, Aruba TAC

About this talk

Health checks must be enabled to determine the path availability of each WAN uplink. When enabled, the gateway will send UDP or ICMP probes to an IP or FQDN of a host to determine if the path is available to accommodate traffic. The primary use case for health checks is to verify that each ISP’s network is operational and prevent branch traffic from being forwarded into a black hole. Aruba gateways can implement DPS policies to determine the WAN uplinks that are selected for specific users, applications, and destinations. The selected forwarding path could be a single WAN uplink or traffic could be load balanced between a group of WAN uplinks. The destination IP address of the traffic will determine if the traffic is steered towards a VPN tunnel or forwarded directly to the Internet. The DPS policy effectively selects an uplink and the gateway’s routing table or policy-based routing (PBR) rules will determine the next hop. Agenda: 1. Introduction to Health Check and DPS 2. Features and basic setup requirements 3. Uplink health check configurations 4. DPS Policies Configurations 5. DPS policies verification 6. DPS Traffic Verification 7. Flow with routing plus DPS

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