新一代數據中心網絡架構變革會遇到哪些難題

详情描述：

隨着雲計算、虛擬化、SDN等技術在數據中心持續落地，數據中心網絡到了不得不改變的時候了。那麼，新一代數據中心網絡架構變革會遇到哪些難題?

難題一：大二層MAC容量問題

二層網絡根據MAC地址來完成點到點的轉發，在數據中心裏擁有數千台服務器是再普通不過的了，而如今跨數據中心之間也要實現二層轉發，這樣就要求數據中心的核心設備MAC容量超大才行。

難題二：環路問題

二層網絡常見的網絡故障就是環路問題，在網絡規模比較小的情況下，可以通過部署STP/MSTP這些環路協議避免環路的產生。

難題三：廣播域過大的問題

因為整個數據中心，甚至多個數據中心之間都是二層的，那麼一個廣播報文會在整個數據中心的設備上進行廣播的，顯然會佔用大量的網絡帶寬，如果廣播流量比較多，可能會造成個別的端口出現擁塞，從而影響業務。

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What are the challenges of a new generation of data center network architecture changes?

1.Large Layer MAC capacity problem

The Layer 2 network performs point-to-point forwarding based on MAC addresses. It is common to have thousands of servers in the data center, and now there is a two-tier forwarding between data centers, which requires data centers Core equipment MAC capacity oversize Caixing.

2.Loop problem

The most common network fault in the Layer 2 network is the loop problem. When the network size is relatively small, the loopback can be avoided by deploying STP / MSTP loop protocols.

3.Broadcast domain is too big problem

Because the entire data center, and even multiple data centers are two layers, then a broadcast message in the entire data center equipment on the broadcast, obviously will take up a lot of network bandwidth, if the broadcast traffic is more likely Will cause individual ports to become congested, thus affecting the business.

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