What are the current mainstream technologies used in data centers and their advantages and disadvantages?

Will business chaining technologies become mainstream in data centers? Based on SR, NSH, traditional PBR technology

1, SR-based technology, whether SR-TE or SRv6, the advantage is that if the data center internal support can be and WAN collaboration, it seems to be able to realize the flexible programmable and flexible deployment, for the virtualization of the network NFV, SR route, VXLAN, overlay and other intelligent analysis and scheduling. Overlay and other intelligent analysis and scheduling, beyond the traditional routing and switching protocols to support service correlation capabilities and intelligent scheduling.

The advantages are still obvious, SR-TE based on WAN SDN solutions

2, NSH, through a specific NSH (network service header) header to support the business chain, the benefit is more flexible

NSH can be extended to the message again, can carry more business information, to complete more complex business processing; more scalable, can support carrying multiple business context information;?

3. Traditional PBR technology is characterized by simple maturity, but complex deployment and consumption of ACL resources

PBR technology can configure different paths according to different services, but it can only statically configure the user's service paths, and generally can only be based on the APN for users/traffic to carry out a rough division of the user/traffic, and is almost imperceptible to the user, the application, and the network information, and can only provide limited service combinations, and there is a problem of a single service. service combinations, there is the problem of single service, network node inefficiency and scalability challenges. If you want to provide personalized services, the network architecture adjustment is extremely complex, the integration cycle is long, and the cost is high, which will significantly increase the complexity of the network and operating costs.