BROCADE IP PRIMER

Chapter 15: Server Load Balancing (SLB)To mark a server as “backup”:SLB-ServerIron#conf tSLB-ServerIron(config)#server real rs1SLB-ServerIron(config-rs-rs1)#backupThis command does nothing until the Primary/Backup configuration is triggeredat the virtual server port level. To trigger this configuration:SLB-ServerIron#conf tSLB-ServerIron(config)#server virtual wwwSLB-ServerIron(config-vs-www)#port http lb-pri-serversIf there are no “backup” servers defined, all the bound real servers are used.“Backup” servers can always be added later, if desired.ClonesNope. I'm not talking about sheep. I'm talking about real servers. Let's say youneed to configure some real servers, a lot of real servers. For example, let'ssay you're configuring real servers for a farm of 200 servers. You can alreadyfeel your wrists cramping, can't you?Well, Brocade's stepped in to help with a cloning function. You can clone anexisting real server. The clone copies all of the base “port” commands (notLayer 7 checks, etc.), and it automatically binds the newly-created real serverinto the same virtual server (and in the same way). To clone:SLB-ServerIron#conf tSLB-ServerIron(config)#server real rs1SLB-ServerIron(config-rs-rs1)#clone-server rs2 10.1.1.12Summary• The Brocade ServerIron provides switching on Layers 2-7• The minimum requirements for a ServerIron chassis are one ApplicationSwitch Management Module, one Management Module, one Switch FabricModule, and one Interface Module.• Barrel Processors (BP) are dedicated to load balancing functions• The ServerIron offers unique protection against TCP SYN attacks withSYN-Defense and SYN-Guard• Predictors are the method the load balancer uses to balance the loadacross real servers— Least Connections— Round-Robin— Weighted350 Brocade IP Primer