CCNP Certification / BCMSN Test Tutorial: Server Load Balancing (SLB)
If you’re working on your BCMSN Test on your own technique to CCNP certification, you’ll read through at size regarding how Cisco routers and multilayer switches can function to deliver router redundancy – but there’s A different helpful service, Server Load Balancing, that does the exact same for servers. Though HSRP, VRRP, and CLBP all symbolize several Bodily routers to hosts as only one Digital router, SLB represents various Bodily servers to hosts as just one Digital server.
In the next illustration, 3 physical servers are already put to the SRB group ServFarm. They’re represented to the hosts given that the Digital server 210.one.one.fourteen.
The hosts will find to communicate with the server at 토토사이트 210.one.one.14, not understanding that they’re really communicating With all the routers in ServFarm. This permits rapid cutover if among the physical servers goes down, and also serves to cover the particular IP addresses with the servers in ServFarm.
The fundamental functions of SLB entails building the server farm, accompanied by producing the Digital server. We’ll to start with add 210.one.1.eleven towards the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# true 210.one.one.11
MLS(config-slb-actual)# inservice
The initial command produces the server farm, with the real command specifying the IP handle of the actual server. The inservice command is required by SLB to take into account the server as ready to handle the server farm’s workload. The real and inservice instructions needs to be repeated for each server inside the server farm.
To create the virtual server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# virtual 210.1.one.14
MLS(config-slb-vserver)# inservice
From your major 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 as soon as the inservice command is utilized.
You may additionally want to manage which of your network hosts can connect with the Digital server. If hosts or subnets are named Along with the shopper command, These would be the only clientele which will connect to the Digital server. Observe this command makes use of wildcard masks. The following configuration would enable just the hosts around the subnet 210.1.1.0 /24 to connect to the virtual server.
MLS(config-slb-vserver)# shopper 210.one.one.0 0.0.0.255
SLB is the server finish’s respond to to HSRP, VRRP, and GLBP – but you continue to have to comprehend it to be a CCNP! Realizing redundancy methods and protocols is vital in currently’s networks, so ensure you’re comfy with SLB just before taking up the Examination.