CCNP Certification / BCMSN Test Tutorial: Server Load Balancing (SLB)
When you’re working on your BCMSN Examination in your solution to CCNP certification, you’ll examine at duration regarding how Cisco routers and multilayer switches can operate to supply router redundancy – but there’s Yet another valuable provider, Server Load Balancing, that does precisely the same for servers. Though HSRP, VRRP, and CLBP all depict many Bodily routers to hosts as just one virtual router, SLB represents numerous Bodily servers to hosts as an individual Digital server.
In the following example, a few Actual physical servers are already positioned into the SRB group ServFarm. They’re represented for the hosts because the Digital server 210.1.1.fourteen.
The hosts will seek to talk to the server at 210.1.1.14, not understanding which they’re essentially speaking While using the routers in ServFarm. This permits brief cutover if one of the Bodily servers goes down, and in addition serves to hide the particular IP addresses with the servers in ServFarm.
The essential operations of SLB will involve generating the server farm, followed by generating the virtual server. We’ll initially incorporate 210.1.1.11 into the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.one.one.11
MLS(config-slb-genuine)# inservice
The very first command makes the server farm, with the real command specifying the IP deal with of the real server. The inservice command is required by SLB to consider the server as Completely ready to handle the server farm’s workload. The true and inservice commands really should be recurring for every server inside 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)# Digital 210.one.one.fourteen
MLS(config-slb-vserver)# inservice
Through the top down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The Digital server is assigned the IP address 210.one.one.fourteen, and connections are allowed once the inservice command is applied.
You may also want to control which of your 먹튀검증 community hosts can connect with the Digital server. If hosts or subnets are named with the customer command, Individuals will be the only clientele that will connect to the Digital server. Take note that this command takes advantage of wildcard masks. The subsequent configuration would enable only the hosts on the subnet 210.one.1.0 /24 to connect with the Digital server.
MLS(config-slb-vserver)# customer 210.one.1.0 0.0.0.255
SLB could be the server conclude’s respond to to HSRP, VRRP, and GLBP – but you continue to ought to know it to become a CCNP! Understanding redundancy tactics and protocols is important in currently’s networks, so ensure you’re relaxed with SLB before taking on the Test.