Software defines why network SDN is bursting red?

  • Andrew Lerner estimates that SD-WAN may be more than twice as expensive as traditional WAN architectures. In a traditional WAN architecture, a 250-branch WAN for more than three years is estimated to cost $1285,000, but it will cost $452,500 for an SD-WAN deployment.

    The market for SD-WAN vendors can be divided into multiple levels: one is the existing routing and switching vendors that are launching SD-WAN products (ie Cisco, HPE, Huawei and Brocade); the other is to expand their products to support SD-WAN technology. Professional WAN optimization vendors (Silver Peak, Riverbed, Talari Networks); third, pure SD-WAN startups (VeloCloud, CloudGenix and Cato Networks); fourth, providers of managed SD-WAN products (AT&T, CenturyLink, Spring, Comcast Business, etc.). Some suppliers have actively engaged in mergers and acquisitions. Cisco acquired Viptella in April and Riverbed acquired Ocedo.

    These easy-to-deploy, easy-to-manage, and cost-reduced advantages make SD-WAN attractive for many businesses. According to Andrew Lerner, the leading adopter of SD-WAN is retailers and financial institutions with a large number of branches.

    So why can't SD-WAN become more common? Many organizations have custom ASICs to control their WANs and LANs, which have long refresh cycles. "Network engineers have traditionally opposed dramatic changes," Andrew Lerner said. "When hardware is ready to be upgraded, companies will spend years thinking about adopting SD-WAN."

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