CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
Any time you’re engaged on your BCMSN Examination in your way to CCNP certification, you’ll read through at duration about how Cisco routers and multilayer switches can function to provide router redundancy – but there’s A different beneficial support, Server Load Balancing, that does exactly the same for servers. Although HSRP, VRRP, and CLBP all symbolize numerous Bodily routers to hosts as a single Digital router, SLB represents multiple Actual physical servers to hosts as an individual virtual server.
In the following case in point, 3 physical servers happen to be put into your SRB team ServFarm. They’re represented for the hosts as the Digital server 210.1.one.fourteen.
The hosts will find 먹튀검증 to communicate with the server at 210.one.1.14, not realizing that they’re truly communicating with the routers in ServFarm. This permits quick cutover if among the list of physical servers goes down, and in addition serves to hide the particular IP addresses of your servers in ServFarm.
The basic operations of SLB consists of generating the server farm, followed by building the virtual server. We’ll very first increase 210.one.one.11 for the server https://www.washingtonpost.com/newssearch/?query=먹튀검증 farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# serious 210.one.one.11
MLS(config-slb-true)# inservice
The initial command results in the server farm, with the actual command specifying the IP address of the actual server. The inservice command is necessary by SLB to evaluate the server as Prepared to manage the server farm’s workload. The real and inservice commands really should be repeated for each server while in 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.one.1.14
MLS(config-slb-vserver)# inservice
Within the best down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The Digital server is assigned the IP deal with 210.one.one.fourteen, and connections are authorized after the inservice command is used.
You may additionally want to manage which within your network hosts can connect to the Digital server. If hosts or subnets are named with the shopper command, All those would be the only clientele which will connect with the virtual server. Observe this command employs wildcard masks. The next configuration would let only the hosts on the subnet 210.1.1.0 /24 to connect with the virtual server.
MLS(config-slb-vserver)# shopper 210.1.one.0 0.0.0.255
SLB will be the server close’s remedy to HSRP, VRRP, and GLBP – but you continue to really need to know it to be a CCNP! Understanding redundancy methods and protocols is important in currently’s networks, so ensure you’re comfy with SLB in advance of taking up the Examination.