CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
Any time you’re focusing on your BCMSN Test on your own way to CCNP certification, you’ll go through at duration regarding how Cisco routers and multilayer switches can get the job done to offer router redundancy – but there’s One more beneficial support, Server Load Balancing, that does the same for servers. Whilst HSRP, VRRP, and CLBP all stand for several Bodily routers to hosts as just one Digital router, SLB signifies multiple physical servers to hosts as one virtual server.
In the subsequent example, three Actual physical servers have already been put to the SRB group ServFarm. They’re represented for the hosts since the Digital server 210.one.1.14.
The hosts will seek out to talk 먹튀검증 to the server at 210.1.1.fourteen, not recognizing which they’re in fact communicating with the routers in ServFarm. This allows brief cutover if on the list of Actual physical servers goes down, and in addition serves to hide the particular IP addresses in the servers in ServFarm.
The basic operations of SLB requires producing the server farm, accompanied by generating the virtual server. We’ll initially add 210.one.1.eleven to your server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.1.1.eleven
MLS(config-slb-serious)# inservice
The main command makes the server farm, with the true command specifying the IP tackle of the true server. The inservice command is required by SLB to evaluate the server as ready to manage the server farm’s workload. The true and inservice commands must be recurring for each server during 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.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 tackle 210.1.1.14, and connections are authorized as soon as the inservice command is utilized.
You may also want to regulate which of one's community hosts can hook up with the virtual server. If hosts or subnets are named with the consumer command, Individuals will be the only shoppers which will hook up with the virtual server. Note this command employs wildcard masks. The subsequent configuration would allow only the hosts within the subnet 210.one.one.0 /24 to connect with the Digital server.
MLS(config-slb-vserver)# customer 210.one.one.0 0.0.0.255
SLB would be the server conclude’s respond to to HSRP, VRRP, and GLBP – but you continue to should realize it to become a CCNP! Understanding redundancy procedures and protocols is vital in these days’s networks, so you should definitely’re at ease with SLB just before taking up the Test.