Monday, September 10, 2012

[SLB] Server Load Balancing with DSR

IPVS ( based on LVS) provides 3 kind of ways to do server load balancing:

  1. Virtual Server via Network Address Translation(VS/NAT)
  2. Virtual Server via IP Tunneling(VS/TUN)
  3. Virtual Server via Direct Routing(VS/DR) 
Recently I find another way to do load balancing, and it is Direct Server Return
Using DSR, packet is returning directly from the server to client without going through L4 switch.
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