CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
Once you’re engaged on your BCMSN exam with your solution to CCNP certification, you’ll browse at length regarding how Cisco routers and multilayer switches can work to offer router redundancy – but there’s another handy assistance, Server Load Balancing, that does exactly the same for servers. Although HSRP, VRRP, and CLBP all stand for a number of Bodily routers to hosts as an individual Digital router, SLB represents various Bodily servers to hosts as just one Digital server.
In the following illustration, 3 Bodily servers have already been put into your 먹튀검증 SRB team ServFarm. They’re represented to the hosts since the Digital server 210.one.one.fourteen.
The hosts will look for to communicate with the server at 210.1.1.fourteen, not knowing which they’re basically communicating with the routers in ServFarm. This permits quick cutover if on the list of physical servers goes down, in addition to serves to cover the particular IP addresses from the servers in ServFarm.
The essential operations of SLB consists of creating the server farm, accompanied by creating the Digital server. We’ll to start with include 210.1.one.eleven on the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# real 210.one.one.11
MLS(config-slb-actual)# inservice
The first command produces the server farm, with the actual command specifying the IP address of the true server. The inservice command is required by SLB to think about the server as Prepared to manage the server farm’s workload. The true and inservice instructions need to be recurring for each server from 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 210.1.1.14
MLS(config-slb-vserver)# inservice
In the top rated down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The Digital server is assigned the IP handle 210.1.one.fourteen, and connections are authorized after the inservice command is applied.
You may additionally want to regulate which of the network hosts can connect with the Digital server. If hosts or subnets are named With all the consumer command, Those people will be the only consumers that will hook up with the virtual server. Notice that this command uses wildcard masks. The subsequent configuration would allow only the hosts about the subnet 210.1.1.0 /24 to hook up with the Digital server.
MLS(config-slb-vserver)# shopper 210.1.one.0 0.0.0.255
SLB is the server conclusion’s respond to to HSRP, VRRP, and GLBP – but you continue to need to understand it to become a CCNP! Knowing redundancy tactics and protocols is important in today’s networks, so make sure you’re comfy with SLB in advance of taking on the exam.