CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
After you’re focusing on your BCMSN exam in your approach to CCNP certification, you’ll study at duration about how Cisco routers and multilayer switches can do the job to deliver router redundancy – but there’s A different handy company, Server Load Balancing, that does the exact same for servers. Although HSRP, VRRP, and CLBP all represent various physical routers to hosts as just one virtual router, SLB represents a number of physical servers to hosts as an individual virtual server.
In the next instance, a few physical servers have already been placed in the SRB team ServFarm. They’re represented for the hosts since the Digital server 210.1.one.14.
The hosts will find to talk to the server at 210.one.one.fourteen, not being aware of which they’re actually speaking Using the routers in ServFarm. This allows brief cutover if one of several Actual physical servers goes down, and in addition serves to hide the actual IP addresses of the servers in ServFarm.
The essential operations of SLB involves building the server farm, followed by making the virtual server. We’ll 1st add 210.1.1.11 for the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# serious 210.1.one.eleven
MLS(config-slb-genuine)# inservice
The initial command makes the server farm, with the true command specifying the IP handle of the real server. The inservice command is required by SLB to think about the server as All set to take care of the server farm’s workload. The true and inservice instructions really should be repeated for each server within the server farm.
To develop the Digital server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# virtual 210.1.one.fourteen
MLS(config-slb-vserver)# inservice
With the best down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The Digital server is assigned the IP tackle 210.one.one.fourteen, and connections are permitted when the inservice command is used.
You may also want to control which within your network hosts can hook up with the Digital server. If hosts or subnets are named with the customer command, People would be the only customers which can hook 토토사이트 up with the virtual server. Take note that this command takes advantage of wildcard masks. The next configuration would permit just the hosts to the subnet 210.1.one.0 /24 to hook up with the Digital server.
MLS(config-slb-vserver)# client 210.1.1.0 0.0.0.255
SLB would be the server conclude’s remedy to HSRP, VRRP, and GLBP – but you still should comprehend it to be a CCNP! Knowing redundancy methods and protocols is significant in these days’s networks, so ensure that you’re comfy with SLB ahead of taking on the exam.