Episode 11 – Shaking The Status Quo

The network engineering community can get a bit stuck on ideas from time to time, and we take a stab at challenging some of these deeply held beliefs in Episode 11 of Network Collective. Join Ethan Banks, Mike Bushong, and the Network Collective crew as we talk about certifications, multi-vendor environments, orchestration, disaggregation, SDN, cloud, and the network industry hype cycle. Yeah, all of that in one 50 minute package. You’re not going to want to miss this one.

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Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

Ethan Banks

Guest

Mike Bushong

Guest

Jordan Martin

Co-Host

Eyvonne Sharp

Co-Host

Phil Gervasi

Co-Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post Episode 11 – Shaking The Status Quo appeared first on Network Collective.

Episode 11 – Shaking The Status Quo

The network engineering community can get a bit stuck on ideas from time to time, and we take a stab at challenging some of these deeply held beliefs in Episode 11 of Network Collective. Join Ethan Banks, Mike Bushong, and the Network Collective crew as we talk about certifications, multi-vendor environments, orchestration, disaggregation, SDN, cloud, and the network industry hype cycle. Yeah, all of that in one 50 minute package. You’re not going to want to miss this one.

—–
Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

Ethan Banks

Guest

Mike Bushong

Guest

Jordan Martin

Co-Host

Eyvonne Sharp

Co-Host

Phil Gervasi

Co-Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post Episode 11 – Shaking The Status Quo appeared first on Network Collective.

What is happiness ? Let me show you !

My little , sweet baby girl has just born. This is happiness and I feel totally different now. I am a father of two now ? She says hello to all networking community and father’s friends ?  

The post What is happiness ? Let me show you ! appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

52% off 299-Piece All-Purpose First Aid Kit – Deal Alert

This full-fledged, easy-to-tote first aid softpack is designed to save time and frustration in the midst of an emergency. It's compact and portable, but contains 299 physician-recommended supplies.  Among the items neatly organized inside the zippered kit is a first aid guide, vinyl gloves, bandages, cold compress, gauze pads, trauma pad, cotton-tipped applicators, first aid tape roll, antiseptics and all three common OTC pain medications. The kit is currently a #1 best seller on Amazon, averages 4.5 out of 5 stars from over 280 customers, and its typical list price of $26.74 has been reduced 52% to just $12.80. Click over to Amazon to see this deal.To read this article in full or to leave a comment, please click here

Save A Whopping $100 on Amazon Echo Right Now By Going Refurbished – Deal Alert

You can pick up Amazon Echo for VERY far below list price, if you're comfortable buying refurbished. Which you can be -- certified refurbished products are tested and certified to look and work like new, and come with warranties. Echo typically lists for $180, or $165 refurbished, but right now it looks like Amazon's letting them go for just $80. Amazon Echo is a hands-free speaker you control with your voice. Echo connects to the Alexa Voice Service to play music, provide information, news, sports scores, weather, and more—instantly. All you have to do is ask. Echo has seven microphones and beam forming technology so it can hear you from across the room—even while music is playing. Echo is also an expertly tuned speaker that can fill any room with 360° immersive sound. When you want to use Echo, just say the wake word “Alexa” and Echo responds instantly. If you have more than one Echo or Echo Dot, Alexa responds intelligently from the Echo you're closest to with ESP (Echo Spatial Perception). See the certified refurbished Amazon Echo on Amazon.To read this article in full or to leave a comment, please click here

Wireless ISPs Spectrum Problem

Wireless ISPs also known as WISP mostly use unlicensed frequency spectrum. Frequency spectrum is the most critical asset for the Mobile and Wireless networks and it is sold in auctions for 100s of millions of dollars.   Frequency spectrum is managed by the governments and governments in general, sell frequency spectrum in auctions.   And […]

The post Wireless ISPs Spectrum Problem appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

NSX-T: Routing where you need it (Part 1)

Network virtualization has come a long way. NSX has played a key role in redefining and modernizing networking in a Datacenter. Providing an optimal routing path for the traffic has been one of the topmost priorities of Network Architects. Thanks to NSX distributed routing, that the routing between different subnets on a ESXi hypervisor can... Read more →

NSX-T: Routing where you need it (Part 1)

 Following is how traffic would go from Web VM1 to App VM1.

1. Web VM1 (172.16.10.11) sends traffic to the gateway 172.16.10.1, as the destination (172.16.20.11) is in different subnet. This traffic traverses Web-LS and goes to Downlink interface of Local distributed router running as a kernel module on ESXi Host.
2. Routing lookup happens on the ESXi distributed router and 172.16.20.0 subnet is a Connected route. Packet gets routed and is put on the App-LS.
3. Destination MAC lookup for MAC address of App VM1 is needed to forward the frame. In this case, App VM1 is also hosted on the same ESXi, we do a MAC address lookup and find a local MAC entry as highlighted in diagram above.
4. L3 rewrite is done and packet is sent to App VM1.

Please note that the packet didn’t have to leave the hypervisor to get routed. This routing happened in kernel. Now that we understand the communication between two VMs (in different subnet) on same hypervisor, let’s take a look at the packet walk from Web VM1 (172.16.10.11) on ESXi to DB-VM1 (172.16.30.11) hosted on KVM.

 

Distributed Routing for VMs hosted on the different Hypervisors (ESXi & KVM)

 

1. Web VM1 (172.16.10.11) sends traffic to the gateway 172.16.10.1, as the destination (172.16.30.11) is in different subnet. This traffic traverses Web-LS and goes to Downlink interface of Local distributed router on ESXi Host.
   
2. Routing lookup happens on the ESXi distributed router. Packet gets routed and is put on the DB-LS. Following output show the distributed router on ESXi host and it’s routing table.

3. Destination MAC lookup for MAC address of DB VM1 is needed to forward the frame. MAC lookup is done and MAC address of DB VM1 is learnt via remote TEP 192.168.150.152. Again, this MAC/TEP association table was published by NSX Controller to the hosts.

4. ESXi TEP encapsulates the packet and sends it to the remote TEP with a Src IP=192.168.140.151, Dst IP=192.168.150.152.

5. Packet is received at remote KVM TEP 192.168.150.152, where VNI (21386) is matched. MAC lookup is done and packet is delivered to DB VM1 after removing the encapsulation header.

A quick traceflow validates the above packet walk.

This concludes the routing components part of this blog. In the next blog of this series, I will discuss multi-tenant routing and connectivity to physical infrastructure.

Continue reading

The Sun sets on Solaris and Sparc

After years of struggle and fading recognition, it seems the end is finally here for Solaris and Sparc, the Unix operating system and RISC processor designed and championed by Sun Microsystems and inherited by Oracle in 2010.In a move that will win it no PR points, Oracle sent out recorded telephone messages to employees who were let go on the Friday before the Labor Day weekend. Yes, firing by voice mail. Classy.The exact number is being debated, but talk on one message board puts it at 2,500. That’s both Solaris and Sparc engineers. The workers affected are primarily in the Santa Clara area, in a former Sun office not even a mile from Intel’s headquarters, but they are in three other states and India as well. To read this article in full or to leave a comment, please click here

The Sun sets on Solaris and Sparc

After years of struggle and fading recognition, it seems the end is finally here for Solaris and Sparc, the Unix operating system and RISC processor designed and championed by Sun Microsystems and inherited by Oracle in 2010.In a move that will win it no PR points, Oracle sent out recorded telephone messages to employees who were let go on the Friday before the Labor Day weekend. Yes, firing by voice mail. Classy.The exact number is being debated, but talk on one message board puts it at 2,500. That’s both Solaris and Sparc engineers. The workers affected are primarily in the Santa Clara area, in a former Sun office not even a mile from Intel’s headquarters, but they are in three other states and India as well. To read this article in full or to leave a comment, please click here

IDG Contributor Network: Connecting the car

It’s an interesting paradox: the more connected the car, the less connected the driver.As a gearhead, that frightens me. I’ve always gravitated toward muscle cars, both new and old, because I like to feel connected to the car. I like the feeling of being pushed back in the seat when I press the long, skinny pedal. I love the experience of going through the gears and the throaty roar of a finely-tuned V8, like the one in my “TrackPack” optioned Mustang GT.But as a techie, I also appreciate connected and autonomous cars – so long as they don’t look like inflated characters from classic video game, Dig Dug.You Googlers know exactly what I mean!To read this article in full or to leave a comment, please click here

Apple Watch / Red Sox cheating scandal points toward larger issues

Newsflash: Someone just found a viable use case for the Apple Watch. Too bad it turned out to be cheating at baseball!Wearable technology such as fitness trackers and smart watches have long been seen as aids for athletes to improve their performance and help them win. And that’s great. But now that the Boston Red Sox have been caught red handed using Apple Watches to communicate and transfer signs stolen from the Yankees, it seems there may also be an unanticipated dark side to the Internet of Things (IoT) in sports.To read this article in full or to leave a comment, please click here

Using Keybase with GPG on macOS

During my too-brief stint using Fedora Linux as my primary laptop OS (see here for some details), I became attached to using GPG (GNU Privacy Guard)—in conjunction with Keybase—for signing Git commits and signing e-mail messages. Upon moving back to macOS, I found that I needed to set this configuration back up again, and so I thought I’d document it here in case others find it useful.

I’m making a couple assumptions here:

1. First, I’m assuming you’ve already signed up for Keybase, generated your proofs, installed the app (this provides the keybase CLI tool), and created a PGP key using Keybase. (Hard-core PGP/GPG users will probably prefer to create their key outside of Keybase and import it, but then again they aren’t necessarily the target audience for this article either.)

2. Second, I’m assuming you’ve already installed GPG on your Mac, typically via something like GPG Tools.

With those assumptions in mind, let’s assume that you’d like to be able to use the PGP key generated by/stored in Keybase with something like GPGMail. Here are the steps you’d need to follow to do that:

1. First, you’ll need to export the PGP public key out of Keybase and into Continue reading

Location-Based Tech: NFC, WiFi, and BLE

When the Network Knows All

New in Ansible for Networking Engineers Online Course

Plenty of new stuff was added to the Ansible for Networking Engineers online course and webinar since the last update.

Fun things first: I needed adjustable check mode behavior and change tracking in some playbooks, and documented these features in two new videos (online course and webinar).

U.S. Cyber Command gains status | Salted Hash Ep 1, Pt 2

Reporters Steve Ragan and Fahmida Rashid discuss the implications of the U.S. Cyber Command's recent elevation in status, putting it on the same level as the military’s other functional combatant commands.

Ransomware: What you need to know now | Salted Hash Ep 1, Pt 4

Reporters Fahmida Rashid and Steve Ragan talk about the latest ransomware threats, the holes in IT security and the burdens on enterprises.

Salted Hash: Kaspersky Lab, U.S. Cyber Command, Hollywood hacking and ransomware

Reporters Steve Ragan and Fahmida Rashid unpack the hottest topics in the security realm: Kaspersky Lab's Russia connection, the new status for the U.S. Cyber Command, Hollywood's hacking woes and ransomware.

Hollywood’s hacking woes | Salted Hash Ep 1, Pt 3

Reporters Fahmida Rashid and Steve Ragan talk about hacks of Sony and more recently, HBO, and what lessons enterprises can learn from the entertainment industry's mistakes.