CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
Any time you’re engaged on your BCMSN Examination on the approach to CCNP certification, you’ll browse at duration regarding how Cisco routers and multilayer switches can perform to supply router redundancy – but there’s A further practical company, Server Load Balancing, that does a similar for servers. When HSRP, VRRP, and CLBP all characterize several Bodily routers to hosts as just one Digital router, SLB represents a number of physical servers to hosts as an individual virtual server.
In the following illustration, 3 Bodily servers are already put in the SRB team ServFarm. They’re represented to the hosts given that the virtual server 210.one.1.14.
The hosts will seek to communicate with the server at 210.one.1.fourteen, not knowing they’re basically speaking While using the routers in ServFarm. This allows brief cutover if on the list of Bodily servers goes down, http://www.thefreedictionary.com/먹튀검증 and likewise serves to hide the actual IP addresses on the servers in ServFarm.
The essential operations of SLB requires making the server farm, followed by making the Digital server. We’ll initial add 210.1.one.11 on the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# serious 210.1.1.11
MLS(config-slb-true)# inservice
The very first command generates the server farm, with the real command specifying the IP deal with of the actual 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 commands ought to be repeated for every server from the server farm.
To generate the Digital server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# Digital 210.one.one.14
MLS(config-slb-vserver)# inservice
Through the leading down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP deal with 210.one.one.14, and connections are allowed as soon as the inservice command is utilized.
You may also want to control which of your community hosts can connect to the Digital server. If hosts or subnets are named Together with the client command, People will be the only purchasers that may connect to the Digital server. Note that this command makes use 먹튀검증 of wildcard masks. The following configuration would allow only the hosts around the subnet 210.1.1.0 /24 to connect with the virtual server.
MLS(config-slb-vserver)# customer 210.1.1.0 0.0.0.255
SLB will be the server end’s response to HSRP, VRRP, and GLBP – but you still really need to realize it to become a CCNP! Recognizing redundancy approaches and protocols is vital in these days’s networks, so ensure you’re cozy with SLB in advance of taking on the exam.