Organizations that require 24/7 reliability for applications running over the WAN use ISP load balancing. Multi-location enterprises also require VPN failover to maintain secure and reliable communications for partners, customers and employees. Organizations rely on ISP load balancing for critical service application delivery over the WAN. Additionally, many organizations now rely upon quality of service (QoS) and traffic shaping for “tuning” bandwidth to guaranty delivery of applications over the WAN.

Ecessa’s PowerLink™ provides outgoing bandwidth load balancing at the TCP/UDP session layer. The user defines weights (bandwidth capacity) based on the bandwidth of each WAN link. When a session is generated from the LAN, PowerLink computes which link has the most available bandwidth and routes traffic from that session over that particular WAN link. The PowerLink allows the selection of two link load balancing algorithms:

• Symmetrical round robin - routes sessions to all links in a round robin manner.
• Intelligent (weighted) load balancing - computes a ratio between the weight (bandwidth capacity) of the different WAN links, and then routes sessions accordingly. That is, the faster the link, the more sessions that will be sent over that link, in order to make the most efficient use of all the bandwidth available.

FAQ terms to describe WAN optimization