Cisco Cisco 40 Gigabit Modules 백서

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Trying to keep up with these demands is enough to make your head spin. At the same time, you cannot hold off on

adding the performance and capacity your organization needs. All organizations are facing the same challenges.

The ones that can meet these demands first will gain a clear advantage.

What if there were a way to get the 40-Gbps performance you need right now without rewiring your access layer,

disrupting your organization, or locking you into a proprietary technology? You do not have to wonder. Cisco can

deliver it today with Cisco BiDi optical technology.

Cisco BiDi Optical Technology

New Cisco 40-Gigabit Quad Small Form-Factor Pluggable (QSFP) Bi-Directional (BiDi) transceiver modules give

you 40-Gbps over your existing 10-Gbps cable plant. This means that you can connect your top-of-rack switches

using the same multimode fiber (MMF) and patch cables you are using right now, but get 40-Gbps performance.

Think about what that means from a cost perspective. If you were building a new 40-Gbps data center fabric the

traditional way, you would need to run 8-MMF strands between your access and aggregation layers: a cost of

US$2000 per port, just for parts. With Cisco BiDi technology, you can get 40-Gbps performance using just 2 fiber

strands: a quarter of the cabling. For a standard server rack (384 ports), that translates to a savings of more than

US$550,000.

And that is for a brand-new deployment. If you are upgrading your existing data center, the economics are just as

compelling, because the Cisco 40-Gbps QSFP module can most likely operate in the Cisco data center switches

you are using now. If they support 40-Gbps QSFP modules, they will support Cisco BiDi for about the same cost as

a standard 10-Gbps QSFP MMF module. So you can get a huge performance boost for your data center with:

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Optics that cost 50 percent less than conventional 40-Gbps technology

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Zero fiber migration

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No fiber installation costs and no lengthy disruption to your organization while you rewire the access layer

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No special budget approval and no need to wait months or years to get the capacity you need

You are already wired for 10 Gbps. And if you are using a Cisco top-of-rack switch, it is likely already capable of

supporting 40 Gbps. So why not take advantage of that capacity?

Inside the Optics

Cisco BiDi optics might sound like magic. But this is not some experimental proprietary technology that will lock

you into Cisco for your entire data center infrastructure. It is a standard QSFP, MSA-compliant optical connector

that can operate with any Cisco switch that

supports QSFP modules and connect with any vendor’s

standards-compliant equipment.

The secret is new Cisco optical technology inside the module that converts four channels each of 10-Gbps transmit

and receive signals to two bidirectional channels of 20-Gbps signals. The technology uses specialized, multilayer,

thin-film dielectric coating and lensing, which allows components to both pass and reflect optical signals at the

same time. And it uses Bidirectional Optical Sub-Assembly (BOSA) technology to support two wavelengths

(20 Gbps total) on each fiber. The upshot: Each QSFP can deliver 40 Gbps over the same duplex MMF cabling

you use right now.

And although the technology inside the optics is only available from Cisco, the result is a completely normal 40-

Gbps signal, fully compliant with the ratified 40-Gbps optical standard. So it is interoperable with external taps,

splitters, and any other standards-compliant equipment you use today.