CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
Whenever you’re working on your BCMSN exam on your own way to CCNP certification, you’ll browse at size regarding how Cisco routers and multilayer switches can get the job done to http://www.bbc.co.uk/search?q=먹튀검증 provide router redundancy – but there’s Yet another practical service, Server Load Balancing, that does the exact same for servers. Though HSRP, VRRP, and CLBP all symbolize various Actual physical routers to hosts as one Digital router, SLB signifies multiple Bodily servers to hosts as just one virtual server.
In the next case in point, a few Bodily servers are already placed to the SRB group ServFarm. They’re represented to your hosts as being the virtual server 210.1.one.fourteen.
The hosts will find to communicate with the server at 210.one.1.14, not recognizing which they’re essentially communicating With all the routers in ServFarm. This enables quick cutover if one of several Actual physical servers goes down, and also serves to cover the actual IP addresses with the servers in ServFarm.
The essential functions of SLB includes creating the server farm, followed by making the virtual server. We’ll first increase 210.one.1.11 on the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# serious 210.1.1.11
MLS(config-slb-actual)# inservice
The first command results in the server farm, with the true command specifying the IP deal with of the true server. The inservice command is necessary by SLB to evaluate the server as All set to take care of the server farm’s workload. The true and inservice instructions really should be repeated for each server while in the server farm.
To build 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
From your leading down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The Digital server is assigned the IP deal with 210.1.one.fourteen, and connections are permitted when the inservice command is applied.
You may additionally want to regulate which of your respective network hosts can connect to the virtual server. If hosts or subnets are named with the shopper command, These would be the only customers that could connect with the virtual server. Be aware that this command employs wildcard masks. The subsequent configuration would permit only the hosts around the subnet 210.one.one.0 /24 to hook up with the virtual server.
MLS(config-slb-vserver)# consumer 210.1.1.0 0.0.0.255
SLB will be the server close’s remedy to HSRP, VRRP, and 먹튀검증 GLBP – but you still should know it to be a CCNP! Being aware of redundancy techniques and protocols is vital in right now’s networks, so be sure you’re comfortable with SLB before taking on the exam.