CCNP Certification / BCMSN Test Tutorial: Server Load Balancing (SLB)
Once you’re focusing on your BCMSN exam on the method to CCNP certification, you’ll go through at size about how Cisco routers and multilayer switches can perform to deliver router redundancy – but there’s An additional practical service, Server Load Balancing, that does the exact same for servers. Even though HSRP, VRRP, and CLBP all symbolize multiple Bodily routers to hosts as one Digital router, SLB signifies multiple Bodily servers to hosts as an individual virtual server.
In the next case in point, 3 Actual physical servers are already placed into your SRB group ServFarm. They’re represented on the hosts because the Digital server 210.1.one.fourteen.
The hosts will request to communicate with the server at 210.1.1.fourteen, not understanding they’re basically communicating with the routers in ServFarm. This enables speedy cutover if among the list of Actual physical servers goes down, and in addition serves to cover the actual IP addresses of your servers in ServFarm.
The fundamental functions of SLB will involve generating the server farm, accompanied by producing the Digital server. We’ll initially include 210.one.1.11 to your server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# serious 210.1.1.eleven
MLS(config-slb-actual)# inservice
The primary command makes the server farm, with the true command specifying the IP deal with of the true server. The inservice command is needed by SLB to take into account the server as All set to handle the server farm’s workload. The actual and inservice commands should be recurring for every server in the server farm.
To build the Digital server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# Digital 210.one.1.14
MLS(config-slb-vserver)# inservice
With the prime down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The Digital server is assigned the IP address 210.one.one.14, and connections are permitted after the inservice command is used.
You may also want to control which of one's network hosts can connect with the virtual server. If hosts or subnets are named with the customer command, Those people will be the only customers which can connect to the virtual server. Observe this command makes use of wildcard masks. The subsequent configuration would allow only the hosts within the subnet 210.1.1.0 /24 to hook up with the virtual server.
MLS(config-slb-vserver)# consumer 210.one.1.0 0.0.0.255
SLB could be the server conclusion’s solution to HSRP, VRRP, and GLBP – but you continue to ought to understand it to become a CCNP! Being aware of redundancy methods and protocols is important in right now’s networks, 토토사이트 so ensure that you’re snug with SLB before taking up the Test.
