CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
If you’re engaged on your BCMSN exam in your technique to CCNP certification, you’ll study at size about how Cisco routers and multilayer switches can function to provide router redundancy – but there’s One more helpful support, Server Load Balancing, that does the same for servers. Even though HSRP, VRRP, and CLBP all signify multiple physical routers to hosts as an individual virtual router, SLB represents various Bodily servers to hosts as an individual Digital server.
In the next example, three Bodily servers are placed into your SRB team ServFarm. They’re represented on the hosts as being the Digital server 210.one.1.fourteen.
The hosts will find to communicate with the server at 210.1.1.fourteen, not figuring out they’re actually communicating While using the routers in ServFarm. This allows brief cutover if among the Bodily servers goes down, as well as serves to hide the particular IP addresses from the servers in ServFarm.
The essential functions of SLB involves creating the server farm, followed by generating the virtual server. We’ll first incorporate 210.one.one.11 to your 먹튀검증 server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.1.1.eleven
MLS(config-slb-genuine)# inservice
The 1st command makes the server farm, with the actual command specifying the IP tackle of the true server. The inservice command is needed by SLB to consider the server as Prepared to deal with the server farm’s workload. The actual and inservice commands needs to be repeated for every server in the server farm.
To build the virtual server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# Digital 210.one.one.fourteen
MLS(config-slb-vserver)# inservice
With the prime down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP handle 210.1.one.14, and connections are authorized as soon as the inservice command is used.
You might also want to control which of one's community hosts can connect with the virtual server. If hosts or subnets are named Using the customer command, Those people will be the only customers that could hook up with the virtual server. Be aware that this command utilizes wildcard masks. The subsequent configuration would permit just the hosts to the subnet 210.1.1.0 /24 to hook up with the virtual server.
MLS(config-slb-vserver)# shopper 210.1.one.0 0.0.0.255
SLB will be the server stop’s answer to HSRP, VRRP, and GLBP – but you still really need to realize it to be a CCNP! Knowing redundancy methods and protocols is important in these days’s networks, so you should definitely’re cozy with SLB before taking over the Examination.