CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
Whenever you’re engaged on your BCMSN Examination on your approach to CCNP certification, you’ll study at length about how Cisco routers and multilayer switches can do the job to provide router redundancy – but there’s An additional valuable company, Server Load Balancing, that does the exact same for servers. Even though HSRP, VRRP, and CLBP all depict numerous Bodily routers to hosts as a single virtual router, SLB signifies many physical servers to hosts as a single Digital server.
In the following illustration, a few physical 토토사이트 servers happen to be put into your SRB team ServFarm. They’re represented to the hosts as the Digital server 210.1.one.14.
The hosts will seek out to talk to the server at 210.1.one.14, not knowing that they’re truly speaking While using the routers in ServFarm. This enables quick cutover if on the list of Actual physical servers goes down, as well as serves to hide the particular IP addresses of your servers in ServFarm.
The fundamental operations of SLB involves producing the server farm, followed by making the Digital server. We’ll very first include 210.1.one.eleven to the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# real 210.1.1.eleven
MLS(config-slb-genuine)# inservice
The primary command makes the server farm, with the actual command specifying the IP address of the true server. The inservice command is necessary by SLB to consider the server as ready to manage the server farm’s workload. The real and inservice instructions ought to be repeated for every server inside the server farm.
To generate the Digital server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# Digital 210.1.one.fourteen
MLS(config-slb-vserver)# inservice
From the leading down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The Digital server is assigned the IP address 210.one.one.fourteen, and connections are allowed as soon as the inservice command is utilized.
You may also want to control which of the community hosts can connect to the virtual server. If hosts or subnets are named While using the client command, Individuals would be the only consumers that will connect with the virtual server. Take note this command utilizes wildcard masks. The next configuration would allow just the hosts within the subnet 210.one.one.0 /24 to connect https://en.wikipedia.org/wiki/?search=먹튀검증 with the Digital server.
MLS(config-slb-vserver)# shopper 210.1.1.0 0.0.0.255
SLB may be the server end’s solution to HSRP, VRRP, and GLBP – but you still must realize it to become a CCNP! Understanding redundancy techniques and protocols is important in nowadays’s networks, so be sure to’re at ease with SLB right before taking up the Test.