CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
If you’re focusing on your BCMSN Test on the solution to CCNP certification, you’ll read through at length about how Cisco routers and multilayer switches can function to supply router redundancy – but there’s another handy provider, Server Load Balancing, that does a similar for servers. Whilst HSRP, VRRP, and CLBP all stand for several Actual physical routers to hosts as only one Digital 토토사이트 router, SLB signifies several Bodily servers to hosts as one virtual server.
In the following instance, a few Actual physical servers are put in to the SRB team ServFarm. They’re represented on the hosts since the Digital server 210.one.one.14.
The hosts will find to talk to the server at 210.one.1.fourteen, not understanding which they’re basically communicating With all the routers in ServFarm. This permits brief cutover if one of many Actual physical servers goes down, and likewise serves to cover the actual IP addresses of your servers in ServFarm.
The basic functions of SLB includes making the server farm, followed by making the Digital server. We’ll 1st insert 210.1.one.11 for the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# real 210.one.1.11
MLS(config-slb-real)# inservice
The first command produces the server farm, with the actual command specifying the IP deal with of the true server. The inservice command is needed by SLB to evaluate the server as Prepared to take care of the server farm’s workload. The actual and inservice commands must be recurring for every server within the server farm.
To develop the Digital server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# virtual 210.one.1.fourteen
MLS(config-slb-vserver)# inservice
In the top rated down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The virtual server is assigned the IP tackle 210.one.one.14, and connections are authorized once the inservice command is used.
You might also want to regulate which of your respective community hosts can hook up with the Digital server. If hosts or subnets are named Using the client command, These would be the only clientele which will connect with the virtual server. Notice that this command utilizes wildcard masks. The next configuration would enable just the hosts within the subnet 210.one.1.0 /24 to hook up with the Digital server.
MLS(config-slb-vserver)# shopper 210.1.one.0 0.0.0.255
SLB would be the server end’s solution to HSRP, VRRP, and GLBP – but you still should realize it to become a CCNP! Understanding redundancy procedures and protocols is vital in today’s networks, so make sure you’re at ease with SLB right before taking on the Examination.