What you mentioned - "as i know leaf and spine get tep IP addresses in each pod from Seed pod (Primary POD)" - it's partially inaccurate.
It's true that one of the APICs from Primary POD is the one which assigned the TEP address for nodes in Pod2 (when the new pod is initialized), however, the IP address assigned is from the VTEP Pool configured for Pod2.
Read more about it in the ACI Multi-Pod whitepaper - section IPN control plane (Figure 8):
Thanks for you reply but still i am bit confused as you said (however, the IP address assigned is from the VTEP Pool configured for Pod2) you mean to say that leaf and spine in another pods get IP addresses from Pod 2 Tep pool?
To answer you question: "what is the use of different VTEP Pool (IP) in each multipod site?" - look at this diagram from the paper @Sergiu.Daniluk referred to:
As you can see, the IPN routing table requires a different summary range for each pod.
I suppose the designers COULD have used /32 routes throughout the routing table and allocated the IP addresses for the 2nd (3rd, 4th..) pod from the same pool, but this would have beed a VERY BAD idea, because when you initially set up your first pod, you (presumably) assigned a VTEP Pool sized on pod1 - so trying to squeeze more IP addresses out of this pool is a design for disaster - especially since the only way to re-assign the VTEP pool is to re-initialise the WHOLE pod.
常见的数据中心之间通信均会采用运营商MSTP/OTN专线进行互联实现通信，由于长途线路价格昂贵通常我们需要最大化使用线路带宽，传统的网络传输中通常是尽力而为传输一旦突发流量较大就会发生线路拥塞的情况，从而影响业务正常通信传输。这时候我们可以采用Qos技术来实现数据中心思科设备之间关键网络流量保障，从而实现链路最大化利用。拓扑图场景如下：如上图，SW01是位于数据中心A的广域网接入Cisco Nexus 3048交换机，SW02是位于数据中心B的广域网接...
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