Worth Reading: The end of Moore’s Law?
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HyTrust Intel Compliant SDDC Webinar Q&A: Five Key Questions For a Secure & Compliant SDDC
Your questions from the HyTrust Intel webinar on a secure & compliant SDDC are answered here in this Q&A post. Take a peek!
Creating a Dynamic Lab Environment with vEOS and GNS3 – Part II
SETTING UP A DHCP AND FILE SERVER FOR USE WITH ZTP
Now that we have a couple vEOS instances configured and able to communicate, and we have our out-of-band network set up, we can now begin to use ZTP to provide an initial startup config.
NOTE Notice that we did not connect the Management1 interface of either vEOS instance to anything inside of GNS3. If you remember when we created the VMs, their first interface is a host-only adapter connected to the vboxnet in VirtualBox, so it’s automatically connected and there’s nothing additional we need to do there, but GNS3 doesn’t know that so it considers the interface disconnected, and that’s OK. That saves us from having to add our management server(s) to the topology and cluttering it up (Just imagine trying to have a nice clean-looking topology in GNS3 if you had to have a connection from every vEOS instance to the management server(s) ), which is distracting and ugly - we’re better than that. |
ZTP is enabled as a default on the vEOS instances, but we still need to set up a server to provide DHCP and File services. For servers, Ubuntu is my go-to and I usually Continue reading
Creating a Dynamic Lab Environment with vEOS and GNS3 – Part I
GETTING STARTED
Preliminary Installation Setup
Install GNS3
Install VirtualBox
Get ahold of the .vmdk and aboot.iso files
It is recommended to install VirtualBox AFTER you install GNS3 to avoid problems with GNS3 detecting VirtualBox.
Go to www.arista.com, and go to Support > Software Download. The two files you’ll want are the .vmdk file as well as the Aboot .iso file:
Creating the Management Network
To simulate an out-of-band management network, we will create a vboxnet interface, similar to a loopback interface, on our laptop. This will also allow us to interact with our virtual machines via SSH, etc.
Open VirtualBox, go to Preferences, and click Network. Select “Host-only Networks”, and then click the NIC adapter image with a plus symbol on it to add a new host-only network if there isn’t one already:
Select your newly-created vboxnet and click the screwdriver icon to configure it:
We’re going to be using ZTP to provision our switches, so select “DHCP Server”, ensure “Enable Server” is unchecked, and then click OK:
Verify you have a new interface reflecting your vboxnet configuration:
SETTING UP vEOS
Creating a Base Image
You’ll want a nice, clean base image to create clones Continue reading
Sometimes techy details matter
How terrorists use encryption is going to become central to the Cryptowars 2.0 debate. Both sides are going to cite the case of Reda Hame described in this NYTimes article. On one hand, it shows that terrorists do indeed use encryption. On the other hand, the terrorists used TrueCrypt, which can't be stopped, no matter how many "backdoor" laws the police-state tries to pass.The problem with the NYTimes article is that the technical details are garbled. (Update: at the bottom, I correct them). Normally, that's not a problem, because we experts can fill in the details using basic assumptions. But the technique ISIS used is bizarre, using TrueCrypt containers uploaded to a file-sharing site. This is a horrible way to pass messages -- assumptions we make trying to fill in the blanks are likely flawed.
Moreover, there is good reason to distrust the NYTimes article. Small details conflict with a similar article in the French newspaper Le Monde from January 6. Both articles are based on the same confession by Reda Hame from last August.
For example, in discussing a training accident with a grenade, the NYTimes article says "Mr. Hame did not throw it far Continue reading
The CORD Architecture
Edge provider networks, supporting DSL, voice, and other services to consumers and small businesses, tend to be more heavily bound by vendor specific equipment and hardware centric standards. These networks are built around the more closed telephone standards, rather than the more open internetworking standards, and hence they tend to be more expensive to operate and manage. As one friend said about a company that supplies this equipment, “they just print money.” The large edge providers, such as AT&T and Verizon, however, are not endless pools of money. These providers are in a squeeze between the content providers, who are taking large shares of revenue, and consumers, who are always looking for a lower price option for communications and new and interesting services.
If this seems like an area that’s ripe for virtualization to you, you’re not alone. AT&T has been working on a project called CORD for a few years in this area; they published a series of papers on the topic that make for interesting reading:
PLUMgrid Touts Containers & CloudApex in 5.0 Release
CloudApex functionality is key.
Worth Reading: Yellow journalism on encryption
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Should Apple Build their Own Cloud?
This is one of the most interesting build or buy questions of all time: should Apple build their own cloud? Or should Apple concentrate on what they do best and buy cloud services from the likes of Amazon, Microsoft, and Google?
It’s a decision a lot of companies have to make, just a lot bigger, and because it’s Apple, more fraught with an underlying need to make a big deal out of it.
This build or buy question was raised and thoroughly discussed across two episodes of the Exponent podcast, Low Hanging Fruit and Pickaxe Retailers, with hosts Ben Thompson and James Allworth, who regularly talk about business strategy with an emphasis on tech. A great podcast, highly recommended. There’s occasional wit and much wisdom.