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Entries in Arista Networks (4)


Companies gear up to make 800 Gig modules a reality

Nine companies have established a multi-source agreement (MSA) to develop optical specifications for 800-gigabit pluggable modules.


Maxim Kuschnerov

The MSA has been created to address the continual demand for more networking capacity in the data centre, a need that is doubling roughly every two years. The largest switch chips deployed have a 12.8 terabit-per-second (Tbps) switching capacity while 25.6-terabit and 51-terabit devices are in development. 

“The MSA members believe that for 25.6Tbps and 51.2Tbps switching silicon, 800-gigabit interconnects are required to deliver the required footprint and density,” says Maxim Kuschnerov, a spokesperson for the 800G Pluggable MSA.

A 1-rack-unit (1RU) 25.6-terabit switch platform will use 32 such 800-gigabit modules while a 51.2-terabit 2RU platform will require 64.

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Arista adds coherent CFP2 modules to its 7500 switch 

Arista Networks has developed a coherent optical transport line card for its 7500 high-end switch series. The line card hosts six 100 gigabit CFP2-ACO (analogue coherent optics) and has a reach of up to 5,000 km.


Martin Hull

Several optical equipment makers have announced ‘stackable’ platforms specifically to link data centres in the last year.

Infinera’s Cloud Xpress was the first while Coriant recently detailed its Groove G30 platform. Arista’s announcement offers data centre managers an alternative to such data centre interconnect platforms by adding dense wavelength-division multiplexing (DWDM) optics directly onto its switch. 

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Interconnection networks - an introduction

Part 2: Data centre switching primer to provide some background as to what Rockley Photonics is doing.    

Source: Jonah D. Friedman

If moving information between locations is the basis of communications, then interconnection networks represent an important subcategory. 

The classic textbook, Principles and Practices of Interconnection Networks by Dally and Towles, defines interconnection networks as a way to transport data between sub-systems of a digital system.

The digital system may be a multi-core processor with the interconnect network used to link the on-chip CPU cores. Since the latest processors can have as many as 100 cores, designing such a network is a significant undertaking.

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Arista Networks embeds optics to boost 100 Gig port density

Arista Networks' latest 7500E switch is designed to improve the economics of building large-scale cloud networks.

The platform packs 30 Terabit-per-second (Tbps) of switching capacity in an 11 rack unit (RU) chassis, the same chassis as Arista's existing 7500 switch that, when launched in 2010, was described as capable of supporting several generations of switch design.   


"The CFP2 is becoming available such that by the end of this year there might be supply for board vendors to think about releasing them in 2014. That is too far off."

Martin Hull, Arista Networks

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