What is Data Center Network Technology?
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- Опубликовано: 19 авг 2024
- Jeff Kish covers the network topology in a data center. He will also compare the differences between a traditional campus and a data center network.
Have you ever wanted to poke around a data center and peek at its topology?
It’s not very common for data centers to open their doors to Johnny Public because those doors are tightly guarded. So we need to explain it instead.
A data center network has some commonalities with a traditional campus network. For instance, both use a lot of switches. Both connect to a lot of edge devices. Both still use VLANs, IP, and ethernet. Both use similar protocols like BGP or OSPF.
There are many differences, too.
Though a data centers have tons of switches, it uses very few routers. That’s because data centers tend to be tightly integrated into one building. Data centers don’t span across the country like a satellite office for a business would.
That also means that data centers use a different structure. A campus network typically has three layers; core, distribution, and access. The DC topology can use a similar structure, but the distribution layer is called an aggregation layer.
However, it’s more common for a modern data center to use a spine and leaf structure. Each leaf connects to multiple spines, but spines never connect to each other. Nor do leaves. Leaves connect to spines which, in turn, link back to multiple leaves. Traffic needs to route through leaves to get to each other. That also means that the network core connects directly to the leaves as well.
There’s a reason for this. The DC network topology depends on layer 2, unlike a campus network. Campus networks live and die by layer 3. However, a data center needs the flexibility of layer 2 for things like scaling or migrating a VM from one compute node to another.
You’re also going to find other technologies in a data center that are not common in a campus network. For instance, Fibre Channel is big in data centers. So is VXLAN.
Of course, there are many more differences between a data center and a campus network.
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The humor in listening to this video is just how much acronomyns are spit out over the entire video. That is so funny in itself.
Very Good Content, please make part 2 as well
Thank you for learning with us! You can watch this entire course at: training.cbt.gg/eve
Its conforting you mentioning the layers 👍
Awesome. Av learnt alot
Amazing hopefully this does apply cloud DCs too like aws azure??
Helpful video. just one question why no poe and why no stack if there is core switch?
Hello, great question! Jeff actually addresses this in the course this video is pulled from. In the second skill in Cisco CCNP Data Center Certification Prep: Designing Network Connectivity, Jeff says, “For example, a lot of the technologies that we deploy into a data center are different. We’re going to use technologies like virtual port channels instead of stacking. And we don’t need Power over Ethernet inside of data centers.”
I have CCNA. Please Can you tell me how to get job in data centre?