The first detailed look at how Elon Musk’s space internet could work

Posted on November 9, 2018 by mea

When sending an internet message via Starlink, a ground station will begin by using radio waves to talk to a satellite above it. Once in space, the message will be fired from satellite to satellite using lasers until it is above its destination. From there, it will be beamed down to the right ground station using radio waves again.

Source: The first detailed look at how Elon Musk’s space internet could work | New Scientist

Between distant places, this will allow messages to be sent about twice as fast as through the optical fibres on Earth that currently connect the internet, despite having to travel to space and back. This is because the speed of the signal in glass is slower than it is through space.

Verizon made an enemy tonight

Posted on July 18, 2014 by mea

Watch the video to feel the full pain. What you’ll see is that on Fios it streams at 375 kbps at the fastest. The experience sucks. It takes an eternity to buffer.

Then I connect to a VPN (in this case VyprVPN) and I quickly get up to full speed at 3000 kbps (the max on Netflix), about 10x the speed I was getting connecting directly via Verizon.

via Verizon made an enemy tonight.

From: Verizon’s Accidental Mea Culpa

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Verizon has confirmed that everything between that router in their network and their subscribers is uncongested – in fact has plenty of capacity sitting there waiting to be used. Above, I confirmed exactly the same thing for the Level 3 network. So in fact, we could fix this congestion in about five minutes simply by connecting up more 10Gbps ports on those routers. Simple. Something we’ve been asking Verizon to do for many, many months, and something other providers regularly do in similar circumstances. But Verizon has refused. So Verizon, not Level 3 or Netflix, causes the congestion. Why is that? Maybe they can’t afford a new port card because they’ve run out – even though these cards are very cheap, just a few thousand dollars for each 10 Gbps card which could support 5,000 streams or more. If that’s the case, we’ll buy one for them. Maybe they can’t afford the small piece of cable between our two ports. If that’s the case, we’ll provide it. Heck, we’ll even install it.

Observations of an Internet Middleman

Posted on May 6, 2014 by mea

That leaves the remaining six peers with congestion on almost all of the interconnect ports between us. Congestion that is permanent, has been in place for well over a year and where our peer refuses to augment capacity. They are deliberately harming the service they deliver to their paying customers. They are not allowing us to fulfil the requests their customers make for content.

Five of those congested peers are in the United States and one is in Europe. There are none in any other part of the world. All six are large Broadband consumer networks with a dominant or exclusive market share in their local market. In countries or markets where consumers have multiple Broadband choices (like the UK) there are no congested peers.

via Observations of an Internet Middleman | Beyond Bandwidth.

Shouldn’t a broadband consumer network with near monopoly control over their customers be expected, if not obligated, to deliver a better experience than this?

Your next network operating system is Linux

Posted on October 20, 2013 by mea

Thus, the scale and agility of modern data centers put data center networking at odds with the existing network models. Some problems, such as the number of virtual networks, required the development of new technologies such as VXLAN, while others have required a redesign of the network architecture deployed in the data center. But the problem of managing the network is not rooted in any failure of networking, rather in the design of the network OS.

via Your next network operating system is Linux | Networking – InfoWorld.

Essentially, we can write the equivalent of a device driver to synchronize the kernel state of these data structures with the hardware. Silicon switching ports can be made to appear like NICs to the OS. Thanks to Linux’s Netlink model, a device driver can sit by the side and listen to everything that’s going on with the kernel state — interface up/down, routing entries added/deleted either by user or routing protocols, netfilter entries added or deleted — and synchronize that state with the hardware. Furthermore, the driver can sync the state of counters from the hardware with the kernel state allowing native Linux tools such as ethtool, iptables, or /proc/net/dev to display the correct information, completely unaware that these values are coming from the hardware. Cumulus Networks has developed the first such solution, but others with a similar model may not be far away.

Inside Google’s Software-Defined Network

Posted on May 16, 2013 by mea

The concept of software-defined networking has captured the attention of network engineers and the trade press, but very few examples of a live SDN implementation exist. One of those few is Google. The search giant presented details about its SDN network at the 2013 Open Networking Summit. Let’s take a look.

via Inside Google’s Software-Defined Network – Network Computing.

West Virginia auditor blasts Cisco, state for “oversized” router buy

Posted on February 26, 2013 by mea

The auditor also found Cisco “showed a wanton indifference to the interests of the public” in recommending the investment in its model 3945 branch routers, the majority of which were “oversized” for the requirements of the state agencies using them, the report stated.

via West Virginia auditor blasts Cisco, state for “oversized” router buy – Network World.

Big Switch Girds for SDN Battle

Posted on November 13, 2012 by mea

As expected, the company is promoting a network architecture that uses OpenFlow to program Ethernet switches. As has been fashionable in SDN circles lately, Big Switch is also espousing the idea of a hybrid network — one where OpenFlow-enabled gear is installed next to traditional routers and switches.

via Big Switch Girds for SDN Battle – Telecom News Analysis – Light Reading Service Provider IT.

Service providers would prefer to see the northbound and southbound interfaces be open, Griliches says. That’s because a groundswell of applications is expected to emerge now that SDN has become a hot and venture-fundable area, and no carrier wants to suddenly find out its applications don’t work on a particular vendor’s gear.

Tier 1 Carriers Tackle Telco SDN

Posted on October 22, 2012 by mea

That approach tallies with the new network vision laid out by Michel’s colleague, Axel Clauberg, DT’s vice president of IP Architecture and Design, earlier this year. That vision sees SDN protocols being deployed in data centers and access networks but not in telecom operator core networks. (See DT Unveils New Network Vision.)

via Light Reading Service Provider IT – IP & Convergence – Tier 1 Carriers Tackle Telco SDN – Telecom News Analysis.

What Penetration Testers Find Inside Your Network

Posted on October 19, 2012 by mea

Why is network segmentation so important? “Today, there is still more focus on the perimeter than on internal network segmentation. Network engineers don’t realize that one successful social engineering or client-side attack could mean ‘game over’ once the attacker has that foothold,” Sanders says. Segmentation based on asset importance and level of trust is one of the most effective ways to prevent many of the attacks advanced attackers — and even himself — perform once inside a target network, he says.

via Tech Insight: What Penetration Testers Find Inside Your Network – Dark Reading.

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Cut to the chase.

Tag Archives: network architecture