CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
When you’re engaged on your BCMSN Examination with your solution to CCNP certification, you’ll examine at length regarding how Cisco routers and multilayer switches can do the job to deliver router redundancy – but there’s An additional practical support, Server Load Balancing, that does the identical for servers. Whilst HSRP, VRRP, and CLBP all depict multiple Actual physical routers to hosts as a single Digital router, SLB represents a number of Bodily servers to hosts as an individual Digital server.
In the subsequent instance, three physical servers happen to be placed into the SRB group ServFarm. They’re represented into the hosts since the Digital server 210.1.1.14.
The hosts will request to talk to the server at 210.1.one.14, not realizing that they’re actually speaking While using the routers in ServFarm. This permits brief cutover if one of the Actual physical servers goes down, and also serves to hide the particular IP addresses in the servers in ServFarm.
The basic functions of SLB involves producing the server farm, followed by developing the Digital server. We’ll to start with add 210.one.one.11 on the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# genuine 210.one.one.11
MLS(config-slb-serious)# inservice
The first command results in the server farm, with the real command specifying the IP address of the actual server. The inservice command is necessary by SLB to look at the server as ready to handle the server farm’s workload. The true and inservice commands needs to be repeated for every server during the server farm.
To create the virtual 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
In the leading down, the vserver was named VIRTUAL_SERVER, which represents the server farm ServFarm. The virtual server is assigned the IP tackle 210.one.one.14, and connections are authorized as soon as the inservice command is utilized.
You might also want to control which of one's community hosts can http://edition.cnn.com/search/?text=먹튀검증 connect to the virtual server. If hosts or subnets are named Along with the consumer command, All those will be the only consumers that may hook up with the Digital server. Be aware this command uses 먹튀검증 wildcard masks. The next configuration would make it possible for only the hosts about the subnet 210.one.1.0 /24 to hook up with the virtual server.
MLS(config-slb-vserver)# customer 210.one.1.0 0.0.0.255
SLB is the server end’s remedy to HSRP, VRRP, and GLBP – but you still must understand it to be a CCNP! Knowing redundancy techniques and protocols is significant in currently’s networks, so ensure you’re snug with SLB in advance of taking over the Test.