Buried
in this week’s release about the latest switches from Brocade is an amusing
detail. Two of the three new switch lines don’t use chips from Broadcom, the
company acquiring Brocade.
The
SLX 9140 and SLX 9240 models, announced earlier this week, use the XPliantswitch chip from Cavium, one of a few up-and-comers battling the dominance of
Broadcom’s Trident and Tomahawk chips. (A third switch, the SLX 9540, does use
a Broadcom chip.) And Brocade has already taken advantage of the chips’
programmability.
That
makes two design wins for XPliant in a week, the other one being Arista, which
uses Cavium in its new 7160 Series.
Quick
acceptance for XPliant, which began shipping late in 2014, isn’t a huge
surprise. Recently, Broadcom owned as much as 90 percent of the market for
merchant chips for network switches. It wouldn’t be a stretch to think that
OEMs might be interested in a high-end alternative.
XPliant
can drive a high-end switch, and it has an extra wrinkle in being programmable.
That
lets systems vendors overcome one handicap of using Broadcom, namely that every
Broadcom switch has pretty much the same specs. It’s difficult to stand out
when you’re using the same chip as nearly everybody else.
“The
programmable pipeline is very attractive to us. We used that programmability on
Day 1,” says Nabil Bukhari, Brocade‘s vice president of product management for
switching, routing, and visibility.
In
fact, Brocade is already taking advantage of the programmability. Neither the
9140 nor the 9240 uses the default packet-processing pipeline that Cavium
provides; both include Brocade tweaks, says Bukhari. And the switches are also
programmed for some of Brocade’s own visibility features.
Related:
To Take on Broadcom, Startup Xpliant Needed a Helping Hand
The
programmability of the chips isn’t a one-time thing. The XPliant chips can be
hot-upgraded — that is, they can be reprogrammed after the switch has been
deployed. This means code updates can be pushed to live systems. The switch
starts to resemble a piece of software that can be updated with security
revisions or new protocols.
In
fact, that’s why Brocade selected XPliant for the 9140 and 9240 — its
top-of-rack switches — specifically.
“That
is the place where technology is moving very fast, much faster than the
[normal] lifecycle of these boxes,” Bukhari says. Typically, a top-of-rack box
stays in place for three years; that’s going to be too long of an upgrade
cycle, Brocade believes.
“The
OEMs really feel empowered by us to use all that knowledge they have,” says
Eric Hayes, Cavium’s vice president of switch platforms. “There’s this
inflection point where all the OEMs are looking at what tools they need to
differentiate.”
The
next step would be to let users program the chips, Bukhari says. “I do believe
that in the next one or two generations of ASICs, we’ll reach that capability.”
Chip
Makers
Broadcom
is acquiring Brocade in a $5.9 billion deal but intends to sell the company’s
IP networking business, which includes data center switches such as the SLX
family. Hanging on to that business would be just too awkward because Brocade’s
competitors — the likes of Cisco — are the key customers for Broadcom’s Trident
and Tomahawk chips.
Meanwhile,
competition in switch chips could be heating up. Intel, Marvell, and Mellanox
have all competed with Broadcom over the years, with varying degrees of fervor.
More recently, startup Innovium declared its interest in this space. And
Barefoot Networks is due to begin sampling Tofino, a chip to run the P4
programming language for software-defined networking (SDN), sometime this
quarter.
