Content Caching on Sputnik-Powered Devices: How-To

Routers commonly ship with USB ports nowadays, and Sputnik engineers have been cooking up some good ways to use them.

Here’s the first that we’ve shipped: content caching at the edge. And here’s what it does.
Content caching stores data from frequently visited web sites locally, on the router—or to be exact, on a USB flash drive attached to the router. That way, when the content is requested by a user’s browser it can be loaded locally, from the router, rather than over the Internet.
For example, lets say one of your users visits a popular site such as Facebook, Google News, Yahoo! News or YouTube. The first visitor fetches the web content from the Internet, and it is automatically stored by your Sputnik-powered router. The second visitor then only needs to fetch content that is unique to them—the rest is servved right from the router (at local network speed). As more content is added to the local cache, more and more becomes available to users on your local network.
It’s the same idea used by companies like Akamai to distribute content closer to the “edge” of the Internet, where users are. Only in this case, the “edge” is the Sputnik-powered router only a few feet from the user!
This can dramatically improve network performance and save bandwidth.


How much bandwidth? That depends upon your network. Customers are reporting savings of 10% or even more over time. (We’d love to hear from you if you’re running Sputnik-powered content caching to hear how much bandwidth you save.)
Content caching makes a big difference if the broadband network serving your hotspot is metered, or if you’re on a low bandwidth, high latency connection such as a sattelite.
Sputnik-powered content caching works with the routers we sell that include a USB port, for example the Cisco E200, Cisco E3000, Cisco E3200, Cisco E4200, Netgear WNR3500L and Asus RT-N16.* It requres a SputnikNet Pro subscription for that router.
OK – that sounds good, so how do you get started? It couldn’t be simpler.


  1. Order a Sputnik flash drive from our online store. (We provision and test each USB flash drive to ensure it works well with SputnikNet.)
  2. Put the flash drive into your Sputnik-powered router.
  3. Enable USB support and turn on content caching. enable-caching
  4. Wait 15 minutes for your first bandwidth saving report.
That’s all there is to it. We hope that you enjoy saving bandwidth and providing a faster browsing experience to your customers!
* Supported router list is subject to change over time.