Using Python for HP SDN
A list of links for getting started to use Python to develop application with the HP VAN SDN Controller.
Tab Completion on Cumulus Linux
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This film could have ended much differentlyif Jerry were running Cumulus Linux |
In the bash shell, tab completion capabilities are usually limited to helping complete:
- shell built-in commands
- external executables found in $PATH
- file names
- directory names
Completion in bash doesn't help with things like command line arguments to various commands, but it is (sometimes) smart enough to not offer filenames as completion options to the 'cd' command, choosing instead to only offer directories.
Network devices, on the other hand, tend to have really rich inline help / command completion stuff, and I live by it.
Rather than typing abbreviated commands, I prefer to let the system help me type the whole thing, partly because it eliminates errors, and partly because I usually can't remember the exact syntax for a given platform. Cisco's godawful platform-dependent mac-address-table vs. mac address-table comes immediately to mind as something that always seems to take more than one attempt.
So, rather than typing this:
ROUTER#sh ip bg vpnv4 vr Continue reading
Separating Hype from Reality in SDN
Lately, two acronyms have been making the rounds: SDN (Software Defined Networking) and ACI (Application Centric Infrastructure – promoted by Cisco). Both have things in common which equate to great marketing: a delightful vision and being difficult to pin down in terms of a crisp definition. Let me try to clarify as best I can with the disclaimer that this is purely my perspective representing Arista, as we celebrate the deployment of our second million ports of cloud networking.
The common view is that SDN is a controller or a set of network management products based on Virtualization Technologies or OpenFlow. At Arista we have a more pragmatic view. To us, SDN is a programmatic suite of open interfaces that allows applications to drive networking actions. Unlike the misconception that SDN is just a controller, I believe SDN is about scaling the control, management and data plane with programmatic and open interfaces. This means customizing the network with high-level scripting and programmatic languages, structured and machine-readable APIs, and standards-based protocols as well as interoperability with controller-friendly networks.
As we enter 2014, we are witnessing the deployment of SDN via Arista EOS and associated programmable network applications such as Advanced Telemetry, Continue reading
How to install Kali Linux in Virtualbox : Step-By-Step guide.
Great step by step instructions on how to install Kali Linux in VirtualBox. Plenty of screen shots for those visual people and it really helps tell how the configuration and install should work.
Oracle Virtualbox is an open source virtualization software that can be downloaded from here. It runs on Windows, Linux, Macintosh, and Solaris hosts and supports a large number of guest operating systems . Now we are going to see how to install Kali Linux in Virtualbox. I am using the latest release of Virtualbox for this howto. After downloading and installing virtualbox, open it. Click on New as shown below.
The “Create virtual machine” window opens. Type the name of the virtual machine. select type as Linux and version as Linux 2.6 or Debian. Click on Next.
Then select the RAM for your virtual machine. I put it to 512MB. Make choice according to the memory available in your system. Make sure it is above or same as recommended memory. Click Next.
The size of the hard disk is automatically assigned. We can change it later. I suggest you…
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On The Ground at OpenDaylight Summit 2014
I was fortunate enough to spend this morning (and will be here for quite a while) in Silicon Valley at the first ever OpenDaylight Summit. The initial keynotes were good, but for me the event started last night when I had the opportunity to sit with some of my own industry role models and just talk nerdy, nerdy networking. Considering how very young this project is (10 months), there are a surprisingly large number of people here - over 550 attendees.On The Ground at OpenDaylight Summit 2014
I was fortunate enough to spend this morning (and will be here for quite a while) in Silicon Valley at the first ever OpenDaylight Summit. The initial keynotes were good, but for me the event started last night when I had the opportunity to sit with some of my own industry role models and just talk nerdy, nerdy networking. Considering how very young this project is (10 months), there are a surprisingly large number of people here - over 550 attendees.Addressing 2013
Time for another annual roundup from the world of IP addresses. What happened in 2013 and what is likely to happen in 2014? This is an update to the reports prepared at the same time in previous years, so lets see what has changed in the past 12 months in addressing the Internet, and look at how IP address allocation information can inform us of the changing nature of the network itself.SDN Themes from ONUG – Let the ASIC go
Edit: I banged this out on the flight home from ONUG four months ago. Just found it in the drafts folder. ONUG's spring 2014 conference in New York is just 3 months away.I was privileged to attend the Open Networking User Group (ONUG) Conference, ONUG Academy and mini Tech Field Day event hosted by JP Morgan Chase on October 29 and 30.
I attended at someone else's expense. Disclaimer.
ASICs came up a lot during these couple of days. Following are some ASIC-related things I heard and overheard at ONUG.
Sun Microsystems was overly attached to their SPARC processor (and so was I!) Folks inside Sun made efforts to derail Solaris x86, in order to protect their favorite server platform, and contributed to killing the company altogether. Sad story.
As good as your ASIC is, you'll never keep up with the performance of commodity chipsets. If the whitebox stuff is faster and still good enough to do the job, then it's probably going to win. It's certainly going to cost less. The proprietary ASIC may be better and have more features, but better is the enemy of good enough.
People used to route packets using general-purpose servers Continue reading
CCDE Experience – Free Webex Session
The next CCDE practical exam will take place on 20th February 2014 at 275 Pearson Professional Centers (PPC) testing facilities worldwide. I'm planning to conduct free webex session of "CCDE Experience" on next Sunday 9th February at 6 am UTC to explain about CCDE program, how to prepare for it, and tips and tricks based on my personal experience taking the exam several times.
The webex session will be conducted in English. This is my personal initiative to promote CCDE program, with disclaimer: no guarantee you will pass the exam after you follow my suggested study plan. I use public material for the session. And I will use the opportunity to introduce my idea of Project DEW. Anyone can join this webex, you just need to register using the link below. I expect no NDA question during the session.
Topic: CCDE Experience
Date: Sunday, February 9, 2014
Time: 10:00 am, Arabian Time (Abu Dhabi, Muscat, GMT+04:00)
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To register for this meeting
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1. Go to https://cisco.webex.com/ciscosales/j.php?ED=253413112&RG=1&UID=2234307082&RT=MiMzNg%3D%3D
2. Register for the meeting.
Once the host approves your request, you will receive a confirmation email with instructions for joining the meeting
Review: Cloud Architecture Patterns
Cloud Architecture Patterns Bill Wilder Networks support applications. Okay, that might seem a little obvious, but it needs to be said from time to time. In that vein, I often find it useful to get a better grip on the applications people are putting on networks, and how they expect the network to behave. In […]
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Quiz #22 – Policy Based Routing (PBR) Problem or Not ?
Your company has 3 sites, each with a dedicated border router, R1, R2 and R3.
Site-1 (R1) and Site-2 (R2) have their own internet uplinks, but Site-3 (R3) connects to internet via R2. A GRE tunnel is built between R2 and R3 and applied an MTU of 1440, due to some constraints in the transit network between them. You notice that traffic between same pair of devices works for TCP 1001 but fails for TCP 1002. What's wrong ?
FAT or Entropy Label?
In this article we are going to see two features that improve the load-balancing in the MLPS Core. Why? In the networking when dealing with redundancy of links or paths we are facing the polarization issue. This problem happens when one of the link is congested. Let’s take the example of LAGs, if the hashing […]
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The post FAT or Entropy Label? appeared first on Packet Pushers Podcast and was written by Youssef El Fathi.
Thinking Strategically about the Benefits of IPv6
In my last blog post on how to sell IPv6 to senior managers and executives, the feedback I got from mailing list discussions was that the case for IPv6 was more of mitigating risk than some inherent benefit of IPv6 itself … Continue reading
Restoring Trust in the Internet – Part 1
The Internet has a trust problem. With the recent revelations of government surveillance, traffic interception and modification, compromised products, and suspect algorithms, we have serious problems. Greg and Ethan spoke to this briefly on Show 175 regarding the pwning of several firewall products by the NSA, but the issue goes much further than just compromised […]
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The post Restoring Trust in the Internet – Part 1 appeared first on Packet Pushers Podcast and was written by Jonathan Strine.
Why Python?
It’s been really interesting to see the industry in an all-out zerg rush to adopt Python as a skill-set. What is it about this seemingly arbitrary selection in the vast array of programming languages available out there? What is so special about Python that it comes up in nearly every conversation about SDN? This post has been in drafts for some time, and I was motivated to finish it up by this Packet Pushers episode, where Jeremy Schulman and others discuss Python and its impact to networking.Why Python?
It’s been really interesting to see the industry in an all-out zerg rush to adopt Python as a skill-set. What is it about this seemingly arbitrary selection in the vast array of programming languages available out there? What is so special about Python that it comes up in nearly every conversation about SDN? This post has been in drafts for some time, and I was motivated to finish it up by this Packet Pushers episode, where Jeremy Schulman and others discuss Python and its impact to networking.One leg too few? Architectural Best Practice on SSL VPNs
A couple of times in the past month I’ve been asked where a SSL VPN appliance should be deployed in relation to the firewall. In both cases it was relating to the Juniper Secure Access / MAG platform, but best practice should apply equally to any IPSEC or SSL VPN platform, so I thought it […]
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The post One leg too few? Architectural Best Practice on SSL VPNs appeared first on Packet Pushers Podcast and was written by Glen Kemp.
Show 177 – Current Practices
More Engineers talking about their day-to-day problems. We found Justin Seabrook Rocha and Shawn McGuire lurking in the #PacketPushers ITC channel complaining about stuff. Now they are doing it in front to a microphone. Bring the real world to your real world. Guests Shawn McGuire bigbash on the #Packetpushers channel on irc.freenode.net Twitter : @mcguiresm Blog: http://8bitsbytes.com […]
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The post Show 177 – Current Practices appeared first on Packet Pushers Podcast and was written by Greg Ferro.
The Secret Sauce for Network Services
Tunneling is the Duct Tape of Networking..It is interesting to realize that a big chunk of network features in Data Center, Service Providers and Enterprises use tunneling in one form or another..It would be fun to imagine a “world” without tunnels! Most known MPLS applications are tunneling techniques, for instance in a VPLS/L3VPN Scenario the […]
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The post The Secret Sauce for Network Services appeared first on Packet Pushers Podcast and was written by Karim Jamali.