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Category Archives for "Networking"

Plexxi Pulse—Networking Predictions: 2015 Edition

Happy New Year! The year is off to a great start and we are excited to see what 2015 will bring to the networking space. I have a few predictions of my own (think policy and disaggregation) that were recently published in Network World. What are your networking predictions for 2015? Below are our top picks for networking stories this week.

In this week’s PlexxiTube #FBF (Flashback Friday) video of the week, Dan Backman interviews VMworld 2014 attendees and asks what they’ve done to help their networks accommodate to Big Data.

Network World: SDN, data center predictions for 2015
By Jim Duffy
The predictions for data center and SDN in 2015 are still rolling in. Technology Business Research says software will pervade the data center while start-up Plexxi believes policy and disaggregation will be front and center. Here’s the link to TBR’s 2015 Data Center Predictions. Some of the more interesting prognostications in it are the acceleration of SDN in the enterprise and the ability of hyperconvergence to converge.

Network Computing: 10 SDN Startups On The Cutting Edge
By Marcia Savage
Small companies flush with VC money have led the way in software-defined networking. Here are 10 of the hottest Continue reading

CCIE R&S,SP,Wireless,Collaboration,Datacenter,Security Preparation Recommendations

Orhan Ergun and Neil Moore talked about CCIE Preparation on the packetpushers podcast. Neil Moore is only 8xCCIE in the world and well known geek and HP fellow.     Which exam is the hardest ? What are their advises ? Which certification should be received first, what should be the order ? CCIE vs […]

The post CCIE R&S,SP,Wireless,Collaboration,Datacenter,Security Preparation Recommendations appeared first on Network Design and Architecture.

Palo Alto Virtual Firewalls on Software Gone Wild

One of the interesting challenges in the Software-Defined Data Center world is the integration of network and security services with the compute infrastructure and network virtualization. Palo Alto claims to have tightly integrated their firewalls with VMware NSX and numerous cloud orchestration platforms - it was time to figure out how that’s done, so we decided to go on a field trip into the scary world of security.

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Book Review – End-to-End QoS Network Design: Quality of Service for Rich-Media & Cloud Networks, Second Edition

As part of my CCDE studies, I needed a good resource on QoS. There have basically been two good books on QoS before, the first edition of End to End Qos Network Design and Qos-Enabled Networks: Tools and Foundations. The first edition of this book is good but very dated, it was released back in 2004. Qos-Enabled Networks is a great book but it’s written to not be vendor specific, so you will not get details on platforms or configuration snippets.

In my opinion, earlier books gave a good foundation to understand QoS concepts but there were too few design cases, they were lacking platform information and not enough examples to be able to act as a reference. Since the first edition of this book, a lot has happened, new products and new Places In the Network (PIN) such as Datacenter, Wireless and to some degree MPLS.

The book is written by Tim Szigeti, Christina Hattingh, Robert Barton and Kenneth Briley Jr. Tim is a long time CCIE, technical leader at Cisco. He is the QoS gury responsible for a lot of the Cisco Validated Designs (CVDs) and a frequent presenter at Cisco Live. Christina is a former Technical Marketing Continue reading

Networking FAQ 2: Certifications

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Problems with kvm-ok in VIRL with VMWare Player

I'm installing Cisco VIRL, and despite following the instructions regarding nested virtualization settings, the kvm-ok command was still complaining. I needed to edit the .vmx file for the VIRL VM and add/edit the following:

monitor.virtual_mmu = "hardware"
monitor.virtual_exec = "hardware"
vhv.enable = "TRUE"
monitor_control.restrict_backdoor = "true"
 
 

Problems with kvm-ok in VIRL with VMWare Player

I'm installing Cisco VIRL, and despite following the instructions regarding nested virtualization settings, the kvm-ok command was still complaining. I needed to edit the .vmx file for the VIRL VM and add/edit the following:

monitor.virtual_mmu = "hardware"
monitor.virtual_exec = "hardware"
vhv.enable = "TRUE"
monitor_control.restrict_backdoor = "true"
 
 

Inside AT&T’s grand plans for SDN

AT&T spends some $20 billion per year on capital expenditures, the bulk of that on its massive network, and recently announced a bold plan to adopt Software Defined Networking and Network Function Virtualization in a big way. Network World Editor in Chief John Dix caught up with AT&T Senior Vice President of Architecture & Design Andre Fuetsch for a deeper dive on the grand plan. Let’s start with some background on your role. As I understand it you lead a team of 2,000 engineers and computer scientists. Basically I’m over the architecture and design organization and that includes AT&T’s advanced research organization, AT&T Labs. Our Foundry is also under my purview, which is basically an innovation program where we invite select vendors to come play in our sandbox and innovate new ideas. The bulk of my organization is architecture and design, as well as development. What we do is take the architectures we’re working on, prototype them, build them out, test them, and, if they look viable, scale them and put them into production.To read this article in full or to leave a comment, please click here

No VMware NSX manager connected

If the VMware vSphere Web Client shows no connected NSX Manager, try to restart the NSX Manager service. The issue can happen if the vCenter is restarted or starts after the NSX Manager. Connect to the NSX Manager and in the summary view stop and restart the NSX Management Service : After a while the vCenter […]

Moving a powered off VM from CLI

In this short post we’ll see how to move a powered off VM from one host to another one using CLI commands. The first step is list the required VM: ~ # vim-cmd vmsvc/getallvms Vmid Name File Guest OS Version 4 vcenter1 [esx1_datastore] vcenter1/vcenter1.vmx windows7Server64Guest vmx-08 The VM ID is 4. Let’s check the power […]

Latency: the Killer of Spread-Out Application Stack Ideas

A few months ago I described how bandwidth limitations shatter the dreams of spread-out application stacks with elements residing (or being dynamically migrated) between data centers. Today let’s focus on bandwidth’s ugly cousin: latency.

TL&DR Summary: Spreading the server components of an application across multiple locations (multiple data centers or hybrid cloud deployments) can easily result in dismal performance even when there’s plenty of bandwidth available.

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Bare Metal For the Rest of Us

Bare metal switching technology fueled the world’s big cloud data centers, with a simplified supply chain as the economic driver. Now the technology and economics are hitting the mainstream in open networking solutions for the rest of us.

Bare metal servers changed the world of compute. The same thing is happening in networking: bare metal switches are the foundation for an inevitable shift in data center networking. The movement is called “open networking” but at it’s core, it’s really just about great physical networks with the additional benefits of a rich ecosystem, broad support for automation and monitoring tools, and improved economics.

The big players in bare metal switching – including Accton and Quanta – leverage best-in-class components to deliver high performance switches, and they do it fast. Add an OS (more on that later) and you’ve got a disaggregated model that enables networking that fulfills the vision of the software-defined data center. If SDDC doesn’t matter so much to you, then think of this: bare metal may fulfill your vision of a more affordable, manageable network that gives you the time and funding for more projects that really help your business.

(For comparisons on pricing and shipping speed versus Continue reading

SDN, data center predictions for 2015

The predictions for data center and SDN in 2015 are still rolling in. Technology Business Research says software will pervade the data center while start-up Plexxi believes policy and disaggregation will be front and center.Here’s the link to TBR’s 2015 Data Center Predictions. Some of the more interesting prognostications in it are the acceleration of SDN in the enterprise and the ability of hyperconvergence to converge.To read this article in full or to leave a comment, please click here

Why SDN all-stars are heading to Brocade

Why is it that a who’s who of SDN developers is landing at Brocade? Over the past two years, the company has lured a handful of industry All-Stars to work on software enabling its networking portfolio, including Fibre Channel storage-area network switches, and Ethernet switches and routers. The most recent hire is Michael Bushong, who jumped from start-up Plexxi to Brocade late last year to run product management.To read this article in full or to leave a comment, please click here

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