CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
If you’re working on your BCMSN Test with your way to CCNP certification, you’ll examine at duration about how Cisco routers and multilayer switches can operate to supply router redundancy – but there’s Yet another helpful service, Server Load Balancing, that does the identical for servers. While HSRP, VRRP, and CLBP all characterize multiple Actual physical routers to hosts as one Digital router, SLB represents various Bodily servers to hosts as a single Digital server.
In the subsequent case in point, three Actual physical servers are put to the SRB team ServFarm. They’re represented into the hosts as being the virtual server 210.1.one.fourteen.
The hosts will look for to communicate with the 먹튀검증 server at 210.one.1.14, not recognizing which they’re basically speaking with the routers in ServFarm. This allows quick cutover if one of the physical servers goes down, and likewise serves to cover the particular IP addresses with the servers in ServFarm.
The essential functions of SLB involves developing the server farm, accompanied by making the Digital server. We’ll initially increase 210.1.1.eleven to your server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.1.1.11
MLS(config-slb-true)# inservice
The very first command makes the server farm, with the real command specifying the IP address of the actual server. The inservice command is required by SLB to think about the server as ready to manage the server farm’s workload. The true and inservice instructions needs to be repeated for each server during the server farm.
To generate the virtual server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# virtual 210.1.1.fourteen
MLS(config-slb-vserver)# inservice
Through the top down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The Digital server is assigned the IP tackle 210.one.one.14, and connections are authorized when the inservice command is used.
You may additionally want to control which of the community hosts can connect with the Digital server. If hosts or subnets are named Together with the client command, Individuals will be the only consumers that will connect to the Digital server. Be aware this command works by using wildcard masks. The following configuration would permit only the hosts over the subnet 210.one.one.0 /24 to hook up with the Digital server.
MLS(config-slb-vserver)# customer 210.1.1.0 0.0.0.255
SLB may be the server conclude’s remedy to HSRP, VRRP, and GLBP – but you continue to should comprehend it to be a CCNP! Recognizing redundancy procedures and protocols is vital in these days’s networks, so ensure you’re relaxed with SLB prior to taking on the exam.