CCNP Certification / BCMSN Test Tutorial: Server Load Balancing (SLB)
Whenever you’re focusing on your BCMSN exam on your own solution to CCNP certification, you’ll go through at size about how Cisco routers and multilayer switches can work to provide router redundancy – but there’s Yet another handy support, Server Load Balancing, that does the identical for servers. Although HSRP, VRRP, and CLBP all symbolize many physical routers to hosts as only one virtual router, SLB represents multiple physical servers to hosts as an individual Digital server.
In the subsequent example, three Actual physical servers have been positioned into the SRB team ServFarm. They’re represented to the hosts as being the virtual server 210.one.1.14.
The hosts will request to talk to the server at 210.1.one.fourteen, not figuring out which they’re actually speaking Along with the routers in ServFarm. This permits brief cutover if one of the Actual physical servers goes down, as well as serves to hide the actual IP addresses from the servers in ServFarm.
The essential operations of SLB entails making the server farm, followed by producing the virtual server. We’ll 1st include 210.1.1.eleven towards the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# true 먹튀검증 210.1.one.11
MLS(config-slb-actual)# inservice
The initial command generates the server farm, with the true command specifying the IP handle of the true server. The inservice command is needed by SLB to take into account the server as Prepared to take care of the server farm’s workload. The real and inservice commands ought to be repeated for every server inside the server farm.
To develop the virtual server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# virtual 210.one.one.14
MLS(config-slb-vserver)# inservice
With the prime down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The Digital server is assigned the IP handle 210.one.one.fourteen, and connections are permitted after the inservice command is applied.
You may additionally want to manage which within your community hosts can hook up with the Digital server. If hosts or subnets are named Together with the customer command, People would be the only consumers which can connect to the virtual server. Observe this command makes use of wildcard masks. The following configuration would let only the hosts over the subnet 210.1.1.0 /24 to hook up with the Digital server.
MLS(config-slb-vserver)# customer 210.1.one.0 0.0.0.255
SLB is definitely the server conclusion’s respond to to HSRP, VRRP, and GLBP – but you still ought to know it to become a CCNP! Realizing redundancy procedures and protocols is important in these days’s networks, so be sure you’re relaxed with SLB just before taking over the Examination.