CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
If you’re working on your BCMSN Test with your technique to CCNP certification, you’ll read at size regarding how Cisco routers and multilayer switches can perform to deliver router redundancy – but there’s A further beneficial company, Server Load Balancing, that does precisely the same for servers. Whilst HSRP, VRRP, and CLBP all characterize several Actual physical routers to hosts as a single Digital router, SLB signifies multiple Bodily servers to hosts as one virtual server.
In the following example, 3 Actual physical servers happen to be positioned to the SRB group ServFarm. They’re represented towards the hosts since the Digital server 210.one.one.14.
The hosts will find to communicate with the server at 210.1.1.14, not figuring out they’re truly speaking Along with the routers in ServFarm. This enables speedy cutover if one of the Actual physical servers goes down, and in addition serves to cover the particular IP addresses on the servers in ServFarm.
The basic operations of SLB requires developing the server farm, accompanied by generating the virtual server. We’ll very first incorporate 210.1.one.11 on the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# serious 210.one.one.11
MLS(config-slb-true)# inservice
The primary command results in the server farm, with the real command specifying the IP handle of the true server. The inservice command is necessary by SLB to take into 토토사이트 account the server as All set to manage the server farm’s workload. The true and inservice commands must be recurring for every server during the server farm.
To create the Digital server:
MLS(config)# ip slb vserver VIRTUAL_SERVER
MLS(config-slb-vserver)# serverfarm ServFarm
MLS(config-slb-vserver)# virtual 210.one.one.14
MLS(config-slb-vserver)# inservice
From your top 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 permitted once the inservice command is applied.
You may also want to manage which of your community hosts can connect with the virtual server. If hosts or subnets are named While using the consumer command, These will be the only clients which can hook up with https://en.search.wordpress.com/?src=organic&q=먹튀검증 the Digital server. Observe that this command uses wildcard masks. The next configuration would enable just the hosts over the subnet 210.one.1.0 /24 to connect to the Digital server.
MLS(config-slb-vserver)# client 210.one.1.0 0.0.0.255
SLB may be the server close’s reply to HSRP, VRRP, and GLBP – but you still must know it to become a CCNP! Being aware of redundancy techniques and protocols is vital in right now’s networks, so make sure you’re comfy with SLB just before taking up the Test.