CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
After you’re working on your BCMSN Test on your own approach to CCNP certification, you’ll browse at duration about how Cisco routers and multilayer switches can operate to deliver router redundancy – but there’s A further valuable services, Server Load Balancing, that does exactly the same for servers. While HSRP, VRRP, and CLBP all symbolize multiple physical routers to hosts as one virtual router, SLB represents numerous Bodily servers to hosts as one Digital server.
In the subsequent illustration, 3 Bodily servers have already been placed to the SRB team ServFarm. They’re represented to your hosts given that the Digital server 210.1.one.14.
The hosts will look for to talk to the server at 210.1.one.fourteen, not 먹튀검증 realizing they’re essentially communicating with the routers in ServFarm. This allows fast cutover if among the Actual physical servers goes down, as well as serves to hide the particular IP addresses in the servers in ServFarm.
The basic functions of SLB consists of producing the server farm, followed by developing the virtual server. We’ll 1st include 210.one.one.11 on the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.1.one.11
MLS(config-slb-authentic)# inservice
The main command produces the server farm, with the actual command specifying the IP address of the real server. The inservice command is necessary by SLB to consider the server as Prepared to deal with the server farm’s workload. The real and inservice instructions must be recurring for each server 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)# Digital 210.1.one.14
MLS(config-slb-vserver)# inservice
From your prime down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP address 210.1.1.fourteen, and connections are authorized as soon as the inservice command is utilized.
You might also want to regulate which of one's network hosts can connect with the Digital server. If hosts or subnets are named Together with the customer command, Individuals would be the only clientele that may hook up with the Digital server. Take note that this command utilizes wildcard masks. The next configuration would permit just the hosts about the subnet 210.one.1.0 /24 to connect with the Digital server.
MLS(config-slb-vserver)# shopper 210.1.1.0 0.0.0.255
SLB is definitely the server close’s remedy to HSRP, VRRP, and GLBP – but you continue to need to understand it to become a CCNP! Knowing redundancy methods and protocols is significant in nowadays’s networks, so make sure you’re comfy with SLB in advance of taking up the Examination.