CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
If you’re engaged on your BCMSN Examination with your technique to CCNP certification, you’ll study at size about how Cisco routers and multilayer switches can do the job to deliver router redundancy – but there’s One more handy service, Server Load Balancing, that does precisely the same for servers. Although HSRP, VRRP, and CLBP all signify numerous Bodily routers to hosts as a single virtual router, SLB signifies several physical servers to hosts as only one Digital server.
In the subsequent example, 3 physical servers are already placed in the SRB team ServFarm. They’re represented on the hosts as being the virtual server 210.one.1.14.
The hosts will find to communicate with the server at 210.one.one.fourteen, not understanding they’re basically communicating Using the routers in ServFarm. This enables swift cutover if among the physical servers goes down, and also serves to cover the actual IP addresses on 먹튀검증 the servers in ServFarm.
The fundamental functions of SLB will involve creating the server farm, accompanied by building the virtual server. We’ll initially increase 210.one.one.eleven into the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# authentic 210.1.1.eleven
MLS(config-slb-real)# inservice
The initial command results in the server farm, with the actual command specifying the IP handle of the real server. The inservice command is necessary by SLB to consider the server as ready to manage the server farm’s workload. The actual and inservice instructions must be recurring for every server while in the server farm.
To develop the virtual server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# Digital 210.1.1.14
MLS(config-slb-vserver)# inservice
Through the prime down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP tackle 210.1.1.14, and connections are authorized when the inservice command is used.
You might also want to control which of one's network hosts can hook up with the Digital server. If hosts or subnets are named With all the client command, those would be the only clientele that may hook up with the virtual server. Take note this command utilizes wildcard masks. The following configuration would let just the hosts to the subnet 210.1.one.0 /24 to hook up with the virtual server.
MLS(config-slb-vserver)# shopper 210.1.one.0 0.0.0.255
SLB may be the server close’s remedy to HSRP, VRRP, and GLBP – but you continue to must comprehend it to become a CCNP! Figuring out redundancy techniques and protocols is vital in now’s networks, so ensure you’re comfortable with SLB just before taking on the exam.