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Metaswitch CTO: There May Be Value in Leveraging ARM, Intelligent NIC Technologies for NFV

By Paula Bernier May 20, 2016

Networks are becoming more software-centric, with the goal of making communications service providers more agile, cost-efficient, quick to market, and less vendor-dependent. But while software is where much of the value resides, the fact is that it has to run on something, and that something is hardware.

As CSPs move to implement network functions virtualization, much of the hardware on which virtual network functions will run will to be in the form of industry-standard hardware. To many that translates to mean x86 servers, which are based on Intel technology. However, in at least some cases, VNFs may be able to benefit from higher performance hardware solutions, according to some people in the networking community.

Metaswitch Networks CTO Martin Taylor talked about this potential in a presentation, and an interview with me, earlier this week. More specifically, he said that ARM-based processors and intelligent NICS are two examples of technology worth exploring in the NFV realm.

More than 60 billion ARM-based chips have shipped to date, he said, but ARM technology until recently has been focused on use in small, low power devices. Now, however, ARM-based chips like Cavium’s ThunderX_NT system on a chip, which is optimized for NFV applications, are becoming available. This solution has the potential to deliver lower power consumption, higher density, and lower total cost of ownership than does x86, making it a potential challenger to that Intel technology. It may also be attractive to CSPs, Taylor added, given that Intel is an industry giant, and one of the goals of NFV is to help carriers avoid vendor lock in.

ARM has already been active in the NFV space through its involvement with OPNFV. In November, Enea announced the Pharos Lab for OPNFV; this is a place where network developers can validate applications on ARM-based servers.

And a few weeks ago Metaswitch ported its Clearwater IMS solution onto the Cavium solution to see how it would perform. Metaswitch will be blogging soon about the results of its stress tests.

“It’s the beginning of a journey,” said Taylor, with whom I talked at the Metaswitch Forum in Scottsdale, Ariz.

Intelligent NICs also have the potential to allow for better performance by enabling the VNFs to offload some work to them, Taylor said. That’s important, he explained, because the SDN fabric of NFV at the moment is a bottleneck because it doesn’t perform well enough.

Intel is working on that with DPDK, and that will get us part of the way there, he said, but in doing so it will take up a lot of resources on the host. So purpose-built hardware on the NIC might be a good option following that, Taylor suggested.

However, he said, the telcos may require some convincing that this is mainstream and standard, and not an encroachment of specialized hardware into their new networks. But, he added, some of these NICs are showing up in hyperscale data centers.

“NFV is about leveraging commodity hardware,” he said. “The more interesting question is: What is commodity hardware?”




Edited by Stefania Viscusi

Executive Editor, TMC

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