CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
Once you’re working on your BCMSN Examination on your own way to CCNP certification, you’ll go through at length regarding how Cisco routers and multilayer switches can work to supply router redundancy – but there’s another helpful company, Server Load Balancing, that does the identical for servers. Although HSRP, VRRP, and CLBP all signify several physical routers to hosts as only one virtual router, SLB signifies multiple Bodily servers to hosts as an individual virtual server.
In the following example, a few physical servers have been put in to the SRB group ServFarm. They’re represented into the hosts as the virtual server 210.1.1.fourteen.
The hosts will seek to communicate with the server at 210.one.1.fourteen, not recognizing they’re actually speaking with the routers in ServFarm. This permits rapid cutover if one of the physical servers goes down, as well as serves to cover the actual IP addresses with the servers in ServFarm.
The basic functions of SLB will involve making the server farm, followed by generating the Digital server. We’ll very first increase 210.one.one.11 to the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# real 210.1.1.eleven
MLS(config-slb-real)# inservice
The 1st command results in the server farm, with the actual command specifying the IP deal with of the true server. The inservice command is required by SLB to look at the server as Completely ready to deal with the server farm’s workload. The true and inservice instructions should be repeated for each server from the server farm.
To generate 토토사이트 the Digital server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# virtual 210.1.one.14
MLS(config-slb-vserver)# inservice
In the leading down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The virtual server is assigned the IP handle 210.1.1.14, and connections are permitted after the inservice command is used.
You might also want to control which of your respective community hosts can connect to the Digital server. If hosts or subnets are named with the customer command, People will be the only customers that will hook up with the Digital server. Notice that this command works by using wildcard masks. The next configuration would permit just the hosts around the subnet 210.one.1.0 /24 to connect with the virtual server.
MLS(config-slb-vserver)# consumer 210.1.one.0 0.0.0.255
SLB is definitely the server stop’s remedy to HSRP, VRRP, and GLBP – but you continue to have to know it to be a CCNP! Knowing redundancy approaches and protocols is vital in nowadays’s networks, so make sure you’re comfy with SLB just before taking up the http://edition.cnn.com/search/?text=먹튀검증 Examination.