CCNP Certification / BCMSN Test Tutorial: Server Load Balancing (SLB)
When you’re working on your BCMSN Examination on your way to CCNP certification, you’ll study at duration regarding how Cisco routers and multilayer switches can function to supply router redundancy – but there’s One more helpful company, Server Load Balancing, that does a similar for servers. Even though HSRP, VRRP, and CLBP all symbolize multiple Actual physical routers to hosts as just one Digital router, SLB signifies various Actual physical servers to hosts as a single Digital server.
In the next case in point, three Bodily servers have been placed to the SRB team ServFarm. They’re represented towards the hosts as the virtual server 210.one.one.14.
The hosts will seek to communicate with the server at 210.1.1.14, not realizing which they’re really communicating Together with the routers in ServFarm. This enables brief cutover if one of many Actual physical servers goes down, and likewise serves to hide the actual IP addresses from the servers in ServFarm.
The fundamental functions of SLB includes producing the server farm, accompanied by creating the virtual server. We’ll very first increase 210.1.one.eleven towards the server farm:
MLS(config)# ip slb serverfarm ServFarm
MLS(config-slb-sfarm)# serious 210.one.one.11
MLS(config-slb-true)# inservice
The first command generates the server farm, with the actual command specifying the IP handle of the actual server. The inservice command is needed by SLB to evaluate the server as Prepared to handle the server https://www.washingtonpost.com/newssearch/?query=먹튀검증 farm’s workload. The real and inservice instructions really should be repeated for each server in 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.one.one.14
MLS(config-slb-vserver)# 먹튀검증 inservice
From your leading down, the vserver was named VIRTUAL_SERVER, which signifies the server farm ServFarm. The virtual server is assigned the IP tackle 210.one.1.14, and connections are permitted after the inservice command is used.
You may additionally want to control which of one's community hosts can connect with the Digital server. If hosts or subnets are named Along with the client command, People will be the only shoppers that can connect with the virtual server. Take note this command works by using wildcard masks. The following configuration would make it possible for just the hosts on the subnet 210.1.1.0 /24 to connect with the virtual server.
MLS(config-slb-vserver)# shopper 210.1.1.0 0.0.0.255
SLB could be the server conclude’s answer to HSRP, VRRP, and GLBP – but you continue to should comprehend it to become a CCNP! Understanding redundancy tactics and protocols is important in right now’s networks, so ensure you’re comfy with SLB prior to taking on the Test.