CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
Any time you’re focusing on your BCMSN Test on the strategy to CCNP certification, you’ll go through at size regarding how Cisco routers and multilayer switches can get the job done to offer router redundancy – but there’s Yet another valuable service, Server Load Balancing, that does the exact same for servers. Even though HSRP, VRRP, and CLBP all stand for many physical routers to hosts as an individual virtual router, SLB signifies a number of physical servers to hosts as just one virtual server.
In the following instance, 3 Actual physical servers have already been positioned to the SRB team ServFarm. They’re represented into the hosts as the Digital server 210.one.one.14.
The hosts will seek out to communicate with the server at 210.one.1.fourteen, not figuring out which they’re truly communicating While using the routers in ServFarm. This allows quick cutover if among the Bodily servers goes down, as well as serves to hide the actual IP addresses from the servers in ServFarm.
The essential functions of SLB entails creating the server farm, accompanied by building the virtual server. We’ll initial increase 210.one.1.eleven into the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.one.one.11
MLS(config-slb-serious)# 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 necessary by SLB to consider the server as All set to manage the server farm’s workload. The real and inservice commands need to be repeated for every server during the server farm.
To produce 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
Within the major down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The Digital server is assigned the IP address 210.1.1.fourteen, and connections are authorized after the inservice command is applied.
You might also want to regulate which of your community hosts can connect with the virtual server. If hosts or subnets are named Using the consumer command, Those people will be the only customers that can connect to the virtual server. Be aware that this command works by using wildcard masks. The next configuration would let just the hosts on the subnet 210.one.1.0 /24 to connect to the virtual http://www.bbc.co.uk/search?q=먹튀검증 server.
MLS(config-slb-vserver)# consumer 210.one.1.0 0.0.0.255
SLB could be the server conclude’s remedy click here to HSRP, VRRP, and GLBP – but you continue to really need to comprehend it to be a CCNP! Knowing redundancy approaches and protocols is vital in now’s networks, so be sure to’re comfortable with SLB just before taking up the Examination.