CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
If you’re focusing on your BCMSN Test on your own solution to CCNP certification, you’ll read at size about how Cisco routers and multilayer switches can get the job done to offer router redundancy – but there’s another handy company, Server Load Balancing, that does exactly the same for servers. When HSRP, VRRP, and CLBP all characterize multiple 먹튀검증 Bodily routers to hosts as just one virtual router, SLB signifies many physical servers to hosts as only one virtual server.
In the next illustration, three Actual physical servers have been put in the SRB group ServFarm. They’re represented into the hosts given that the Digital server 210.one.1.14.
The hosts will find to talk to the server at 210.one.1.fourteen, not realizing which they’re actually speaking Using the routers in ServFarm. This enables rapid cutover if among the Actual physical servers goes down, as well as serves to cover the particular IP addresses from the servers in ServFarm.
The essential operations of SLB requires producing the server farm, followed by producing the Digital server. We’ll to start with incorporate 210.one.1.11 to the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# real 210.one.1.eleven
MLS(config-slb-actual)# inservice
The first command produces the server farm, with the actual command specifying the IP deal with of the actual server. The inservice command is needed by SLB to look at the server as Completely ready to deal with the server farm’s workload. The true and inservice instructions need to be recurring for each server in the server farm.
To produce the Digital 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
From your major down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The Digital server is assigned the IP handle 210.one.one.14, and connections are permitted as soon as the inservice command is used.
You may also want to manage which of one's community hosts can connect with the virtual server. If hosts or subnets are named Together with the shopper command, People will be the only clients which can connect to the Digital server. Note this command uses wildcard masks. The subsequent configuration would permit just the hosts about the subnet 210.1.1.0 /24 to hook up with the virtual server.
MLS(config-slb-vserver)# client 210.one.one.0 0.0.0.255
SLB would be the server finish’s response to HSRP, VRRP, and GLBP – but you continue to should comprehend it to be a CCNP! Figuring out redundancy strategies and protocols is important in currently’s networks, so ensure you’re cozy with SLB before taking up the Test.