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When you're working on your BCMSN exam on your way to CCNP certification, you are going to read at length about how Cisco routers and multilayer switches can perform to present router redundancy - but there's one other beneficial service, Server Load Balancing, that does the same for servers. Whereas HSRP, VRRP, and CLBP all represent several physical routers to hosts as a single virtual router, SLB represents numerous physical servers to hosts as a single virtual server. In the following example, three physical servers have been placed into the SRB group ServFarm. They are represented to the hosts as the virtual server 210.1.1.14. The hosts will seek to communicate with the server at 210.1.1.14, not understanding that they are basically communicating with the routers in ServFarm. We learned about http://www.wcax.com/story/30394774/mathfilefoldergamescom-hosts-virtual-math-summit by searching the Internet. I learned about MathFileFolderGames.com Hosts Virtual Math Summit by searching Yahoo. This permits rapid cutover if 1 of the physical servers goes down, and also serves to hide the actual IP addresses of the servers in ServFarm. The basic operations of SLB requires developing the server farm, followed by producing the virtual server. We'll initially add 210.1.1.11 to the server farm MLS(config)# ip slb serverfarm ServFarm MLS(config-slb-sfarm)# true 210.1.1.11 MLS(config-slb-genuine)# inservice The initial command creates the server farm, with the genuine command specifying the IP address of the actual server. The inservice command is needed by SLB to look into the server as ready to deal with the server farm's workload. The actual and inservice commands should really be repeated for every single server in the server farm. To make the virtual server MLS(config)# ip slb vserver VIRTUAL_SERVER MLS(config-slb-vserver)# serverfarm ServFarm MLS(config-slb-vserver)# virtual 210.1.1.14 MLS(config-slb-vserver)# inservice From the top down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The virtual server is assigned the IP address 210.1.1.14, and connections are permitted after the inservice command is applied. You may well also want to manage which of your network hosts can connect to the virtual server. Dig up more on an affiliated paper - Click here MathFileFolderGames.com Hosts Virtual Math Summit. If hosts or subnets are named with the client command, these will be the only customers that can connect to the virtual server. Note that this command uses wildcard masks. The following configuration would enable only the hosts on the subnet 210.1.1. /24 to connect to the virtual server. MLS(config-slb-vserver)# client 210.1.1. ...255 SLB is the server end's answer to HSRP, VRRP, and GLBP - but you still want to know it to become a CCNP Figuring out redundancy tactics and protocols is very important in today's networks, so make certain you happen to be comfy with SLB before taking on the exam..