CCNP Certification / BCMSN Exam Tutorial: Server Load Balancing (SLB)
Once you’re working on your BCMSN exam on your approach to CCNP certification, you’ll browse at size about how Cisco routers and multilayer switches can get the job done to supply router redundancy – but there’s A different useful services, Server Load Balancing, that does the identical for servers. Although HSRP, VRRP, and CLBP all signify several physical routers to hosts as an individual virtual router, SLB represents several Bodily servers to hosts as a single Digital server.
In the subsequent instance, a few Bodily servers have already been put into the SRB team ServFarm. They’re represented into the hosts since the virtual server 210.one.one.fourteen.
The hosts will seek to talk to the server at 210.one.1.14, not knowing which they’re essentially communicating Using the routers in ServFarm. This enables quick cutover if on the list of Bodily servers goes down, and likewise serves to hide the particular IP addresses in the servers in ServFarm.
The basic operations of SLB includes generating the server farm, accompanied by developing the virtual server. We’ll 1st incorporate 210.one.1.eleven into the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# true 210.one.1.11
MLS(config-slb-real)# inservice
The first command produces the server farm, with the true command specifying the IP address of the actual server. The inservice command is required by SLB to think about the server as All set to deal with the server farm’s workload. The real and inservice instructions must be recurring 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
From the top rated down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP deal with 210.1.1.14, and connections are authorized after the inservice command is used.
You may also want to regulate which of your community hosts can hook up with the 먹튀검증 virtual server. If hosts or subnets are named With all the consumer command, These will be the only clientele that can hook up with the Digital server. Observe this command utilizes wildcard masks. The subsequent configuration would permit only the hosts on the subnet 210.one.one.0 /24 to hook up with the Digital server.
MLS(config-slb-vserver)# shopper 210.one.one.0 0.0.0.255
SLB is definitely the server end’s answer to HSRP, VRRP, and GLBP – but you continue to really need to know it to be a CCNP! Realizing redundancy tactics and protocols is significant in now’s networks, so ensure you’re comfortable with SLB right before taking up the Test.