Direct Server Return

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How does Direct Server Return work and what are the advantages.

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Derek Kiely Official comment

Direct Server Return, or DSR as it is commonly referred to, is a method where by traffic hits the LoadMaster on the way in, and bypasses the LoadMaster on the way out.

The primary advantage to DSR is that the LoadMaster only handles a portion of the work associated with load balancing, specifically the inbound traffic. The servers respond directly to the clients, bypassing the LoadMaster on the way out.

If the particular traffic profile for a site is for every packet in, eight packets are sent out, this would result the LoadMaster handling around 87% less traffic than it would without DSR.
For more information and assistance configuring please refer to our Configuring Real Servers for DSR guide.