Spine and Leaf network architecture explained | ccna 200-301

Hello everyone, in this session of

ccna

series, I will discuss about

spine

and

leaf

network

architecture

. A lot has changed in the data center over the past few decades, in fact, so much has changed that the old three-layer model of core and access aggregation. It is no longer ideal since this model was designed based on a south-to-north data flow. Currently, a new

architecture

is replacing the traditional three-

network

architecture, which is also known as spinal

leaf

architecture. The spinal leaf architecture was developed to overcome the limitations of three. Tiered architecture given the prevalence of cloud and containerized infrastructure in modern data centers with east-west traffic continues to increase.

Spinbee model is the ideal choice for building modern data center network. The backbone is a two-layer network architecture composed of leaf and backbone switches. switches, the leaf layer consists of access switches that connect to devices such as servers, storage devices, and Internet devices or vans. Those switches are also called tor or top-of-rack switches or edge-of-rack switches in modern data centers, the

spine

layer is the backbone of the network and is responsible for interconnecting all the leaf switches in this architecture of two-tire trellises. Each leaf switch is connected to each of the pigs, which are column switches in a full mesh topology.

Leaf column networking is most useful for data centers that experience mostly more east-west network traffic than north-south network traffic. Let's look at some of the advantages of the backbone architecture feature, while in a three-tier network a server may need to traverse a hierarchical path through two aggregation switches and a core switch. to communicate with another switch, which adds latency and creates traffic bottlenecks with a column and leaf architecture, no matter which leaf switch a server is connected to, it has to cross the same number of devices each time connects to another switch, another server, the only exception is when the other server is on the same leaf, this approach keeps latency at a predictable level and minimizes bottlenecks because a payload only has to jump between one spine switch and another leaf to reach your destination.

Each leaf connects to all columns with no interconnections between any. neither the thorns nor the leaves, which creates a great structure without blocking. Another important advantage is scalability if a link is oversubscribed. The capacity expansion process is simple. An additional column switch can be added and uplinks can be extended to each leaf switch, resulting in adding bandwidth between layers and reducing oversubscription if the device port capacity becomes One concern, a new leaf switch can be added by connecting it to each core switch and adding network configuration to that switch Ease of expansion optimizes the IT department's process of scaling the network if one of the top tires, which is where it fails , it would only slightly degrade the performance to slightly degrade the performance across the entire data center, that's all about the spine sheet in this session, in my next session I will discuss about the characteristics of the van.

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