CCNP Certification / BCMSN Test Tutorial: Server Load Balancing (SLB)
After you’re focusing on your BCMSN Test with your approach to CCNP certification, you’ll read through at size about how Cisco routers and multilayer switches can do the job to provide router redundancy – but there’s A further beneficial provider, Server Load Balancing, that does the identical for servers. Even though HSRP, VRRP, and CLBP all signify several Bodily routers to hosts as one virtual router, SLB represents various Bodily servers to hosts as just one Digital server.
In the following case in point, a few Bodily servers are already positioned into your SRB team ServFarm. They’re represented for the hosts as being the virtual server 210.one.1.14.
The hosts will look for to talk to the server at 210.1.one.14, not understanding which they’re truly communicating with the routers in ServFarm. This enables brief cutover if one of many physical servers goes down, as well as serves to cover the particular IP addresses of your servers in ServFarm.
The fundamental functions of SLB entails developing the server farm, accompanied by generating the virtual server. We’ll very first add 210.one.1.eleven to the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.1.1.eleven
MLS(config-slb-true)# inservice
The main command makes the server farm, with the true command specifying the IP handle of the actual server. The inservice command is necessary by SLB to take into account the 토토사이트 server as All set to handle the server farm’s workload. The true and inservice commands must be repeated for every server while in the server farm.
To generate the virtual 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
With the prime down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP address 210.1.one.fourteen, and connections are allowed when the inservice command is used.
You might also want to manage which within your network hosts can connect with the virtual server. If hosts or subnets are named with the consumer command, These would be the only consumers which will connect to the virtual server. Notice that this command uses wildcard masks. The next configuration would allow only the hosts about the subnet 210.1.one.0 /24 to connect to the virtual server.
MLS(config-slb-vserver)# customer 210.one.one.0 0.0.0.255
SLB may be the server close’s remedy to HSRP, VRRP, and GLBP – but you continue to really need to realize it to become a CCNP! Figuring out redundancy procedures and protocols is important in now’s networks, so you should definitely’re comfy with SLB ahead of taking on the exam.