But SONiC is troubling for Arista, according to a research report penned by Jefferies analyst George Notter, who writes that 25 percent of Arista’s revenue comes from giant Web-scale companies including Microsoft, Facebook, and Apple, with Microsoft being “responsible for 12 percent of Arista’s 2015 sales.”
At the Open Compute Project (OCP) conference last week Arista allowed Microsoft to run SONiC on Arista switch hardware without Arista’s EOS operating system.
“Arista has long referred to EOS as their secret sauce and the core value in the company,” writes Notter. “It’s clearly troubling if their largest customer has developed a software suite that is mostly duplicative of EOS’s functionality.”
He says about 5 percent of Cisco’s overall switching business comes from Internet content providers, and in Juniper’s case, most of its business with the Web-scale giants comes from routing.
As a result of its analysis, Jefferies reduced its price target on Arista shares to $40.25 from $52.50. The report sent Arista’s stock down about 10 percent, to $56.53.
“Cloud providers for the most part, outside of Google, have their secret sauce as the control plane, which is abstracted from the actual switches,” says Weckel, adding that this control plane is different from the operating system and is more akin to a software-defined networking (SDN) controller.
“There are millions of lines of code that Arista has written,” he says. “It’s not in anyone’s best interest to replace that. It’s not something that could be done quickly.”
So why is Jefferies so concerned about Arista’s future? “If you look at the sell-side community as a whole, most have a buy rating on Arista,” says Weckel. “Notter is more an outlier view.”
He also looks to salve the nerves of switch makers as far as their hardware is concerned. “When Microsoft comes out with an OCP design, it doesn’t mean it’s a white –box switch from Taiwan. Arista, Dell, or Juniper could build these OCP switches. There’s always some customization that they need.”
That’s probably why Arista is working with Microsoft on SONiC, choosing to partner with its biggest customer rather than resist open source software out of fear of losing switching revenue.