CCNP Certification / BCMSN Examination Tutorial: Server Load Balancing (SLB)
After you’re engaged on your BCMSN Examination on the technique to CCNP 먹튀검증 certification, you’ll read through at size regarding how Cisco routers and multilayer switches can operate to supply router redundancy – but there’s A different handy company, Server Load Balancing, that does a similar for servers. While HSRP, VRRP, and CLBP all depict numerous Actual physical routers to hosts as one Digital router, SLB signifies many Actual physical servers to hosts as just one Digital server.
In the next example, 3 Bodily servers are already positioned in the SRB team ServFarm. They’re represented towards the hosts given that the virtual server 210.1.one.fourteen.
The hosts will look for to talk to the server at 210.1.1.fourteen, not knowing they’re really speaking Along with the routers in ServFarm. This enables fast cutover if among the list of Bodily servers goes down, and in addition serves to cover the actual IP addresses of the servers in ServFarm.
The basic operations of SLB entails generating the server farm, accompanied by making the virtual server. We’ll to start with add 210.one.one.11 to the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# actual 210.1.1.11
MLS(config-slb-true)# inservice
The 1st command generates the server farm, with the real command specifying the IP address of the real server. The inservice command is required by SLB to consider the server as Completely ready to handle the server farm’s workload. The real and inservice instructions ought to be repeated for every server while in the server farm.
To develop the virtual server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# Digital 210.1.one.14
MLS(config-slb-vserver)# inservice
With the top down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP tackle 210.one.one.fourteen, and connections are allowed as soon as the inservice command is utilized.
You may additionally want to manage which within your community hosts can connect to the virtual server. If hosts or subnets are named with the client command, Individuals would be the only customers which can connect to the Digital server. Notice that this command makes use of wildcard masks. The following configuration would enable just the hosts about the subnet 210.one.1.0 /24 to connect to the virtual server.
MLS(config-slb-vserver)# consumer 210.1.one.0 0.0.0.255
SLB may be the server stop’s answer to HSRP, VRRP, and GLBP – but you still must know it to become a CCNP! Realizing redundancy tactics and protocols is significant in now’s networks, so make sure you’re relaxed with SLB prior to taking on the exam.