Leaf-Spine Topology Network
Leaf ridge topology network is actually a standard now-the design of various Ethernet products of leaf ridge topology network vendors can basically be applied to this kind of leaf ridge topology network. Because the leaf-ridge topology network has several ideal characteristics, it can give full play to the advantages of the network.
The leaf-spine topology can replace the three-layer structure. Although the three-layer network structure is widely used and the technology is mature, with the development of technology, its bottlenecks are constantly emerging, causing more and more network engineers to abandon networks with this structure.
As companies seek to maximize utility and data center utilization, mainstream three-layer network topologies are becoming less and less capable of meeting demand. "Network topology" refers to the way in which network devices are interconnected, and devices communicate and connect through established protocols and connections.
The standard network data center topology is a three-layer network structure: access layer-client connection network; aggregation layer-switch access; core layer-switch and routing aggregate and connect internal and external networks.
So how to fundamentally solve this bottleneck of the three-tier network structure? A feasible solution is to add a switching layer below the access layer, and the data transmission between the two nodes is completed directly at this layer, thereby offloading the transmission of the backbone network.
This structure is a leaf-spine leaf-ridge topology. The leaf-ridge topology adds a layer of horizontal network structure parallel to the backbone vertical network structure and adds a corresponding switching network to this layer of horizontal structure. Layer network structure cannot do it.
This is similar to the traditional three-layer design, except that there are multiple switching devices in the spine layer. In the leaf-ridge topology, all links are used to forward traffic and also use common spanning tree protocols, such as Multi-Connection Transparent Interconnection Protocol (TRILL) or Shortest Path Bridge (SPB). TRILL and SPB protocols forward all connection traffic, but can also maintain a loop-free network topology, similar to a routed network.