What kind of switches does google use




















And they could accommodate only so many of Google's computers. Cables from these routers would connect to only so many switches at the top of the company's server racks, and these switches could connect to only so many servers. So, in , a small team of Google engineers starting building a new breed of gear.

At the time, Vahdat was still a professor of University of California, San Diego, but unknowingly, he mirrored the company's work with a seminal academic paper published in , a year before he joined the company.

It was only natural he would make the move to Google. In the simplest terms, Google used commodity networking chips to build hardware devices that could run whatever software it wanted. In the past, the company had to buy what the Ciscos of the world were sellingboth hardware and software.

But it moved to a model where it could mold the hardware and the software to suit its needs. Buying chips from companies such as Broadcom , Google built its own top-of-rack switches.

And using the same chips, it pieced together larger cluster switches that could serve as a network backbone. Today, according to Vahdat, one of the company's "Jupiter" cluster switches provides about 40 terabits of bandwidth per secondor the equivalent of 40 million home Internet connections. You can think of the top-of-rack switches as building blocks for the cluster switches. This mirrored similar changes in worlds of computer servers and data storage hardware.

In the past, when companies built large online operations, they bought enormously expensive and complex machines that ran proprietary software.

Now, they buy lots of little machines that they can string together into a larger whole, running all sorts of software that allows these machines to work in concert. Vahdat says relatively little about Google's networking software. But he hints that the hardware runs an operating system based on Linux, the open source OS that also runs the company's computer servers. And he says the company went so far as to design its own data routing protocol, Firepath, used to dictate how information moves from machine to machine.

This is somewhat surprising. But Microsoft's Russinovich says this kind of thing is something Microsoft "is always exploring" in an effort to improve efficiency, and when Google was building its protocol, standard technologies weren't as efficient as they are today. The details of this setup are enormously complex. But the long and the short of it is that the company can now use a central controller to oversee its network and even change how the network operates.

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Can I make calls and texts to another country while I'm traveling? These traits are recommended, if applicable to your device. However, you are free to mix and match from all available traits to best match your existing product functionality.

This section contains example intent payloads representing a common "Switch" based on the device type and traits above. If you add or remove traits in your implementation, modify your responses accordingly to reflect those changes.

For additional details on the command parameters, see the action. OnOff reference. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. For details, see the Google Developers Site Policies. Actions on Google Ways to build Overview. It is usually called eth0.

To change the settings for a wireless connection, select the Wireless tab, then select the appropriate wireless network. If the method is set to something else, do not change it. Click Apply to save the change. If you are prompted for a password or confirmation, type the password or provide confirmation.

Replace the nameserver lines with, or add, the following lines: For IPv4: nameserver 8. Save and exit. Restart any Internet clients you are using.

Replace that line with, or add, the following line: For IPv4: prepend domain-name-servers 8. For example: To change the settings for an Ethernet connection, click on the Ethernet section. To change the settings for a wireless connection, click on the Wi-Fi section and select the appropriate network name.

Changing the DNS settings for a mobile data connection established with Instant Tethering isn't possible. For mobile Wi-Fi hotspots that are manually set up, however, you can change the DNS settings using the instructions for a wireless connection.

Expand the Network section for the selected connection. In the Name servers section: For IPv4: Select the Google name servers button or alternatively, select the Custom name servers button and enter 8.

Click outside the Network section to apply the settings. Routers Every router uses a different user interface for configuring DNS server settings; we provide only the generic procedure. To change your settings on a router: In your browser, enter the IP address of your router to view the router's administration console. Most routers are manufactured to use a default address such as When prompted, enter the password to edit network settings.

Find the screen in which DNS server settings are specified.



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