Musings on Datanauts #9
Great job with this one, guys. I can tell how engaged I am in a podcast by how often I want to interrupt you :)
For this episode, that was lots of times!
Since I couldn't engage during the podcast, I'm going to have a one-sided discussion here, about the topics that grabbed my attention.
RARP?
Chris explained that the 'notify switches' feature of an ESXi vSwitch serves to update the L2 filtering table on upstream physical switches. This is necessary any time a VM moves from one physical link (or host) to another.
Updating the tables in all of the physical switches in the broadcast domain can be accomplished with any frame that meets the following criteria:
- Sourced from the VM's MAC address
- Destined for an L2 address that will flood throughout the broadcast domain
- Specifies an Ethertype that the L2 switches are willing to forward
VMware chose to do it with a RARP frame, probably because it's easy to spoof, and shouldn't hurt anything. What's RARP? It's literally Reverse ARP. Instead of a normal ARP query, which asks: "Who has IP Continue reading
Brocade DemoFriday Q&A + Video: Building a Real-World OpenStack NFV Deployment with L4-7 Services
After its live presentation on how to build a real-world OpenStack NFV deployment with Layer 4-7 services, our DemoFriday presenters took questions from the audience. Read the full Q&A here!
QOTW: Knowledge
Knowledge depends on the direction given to our passions and on our moral habits. To calm our passions is to awaken in ourselves the sense of the universal; to correct ourselves is to bring out the sense of the true.
Sertillanges, The Intellectual Life
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Defining SDN Down
If a WAN product that uses software to control the flow of traffic is an SD-WAN, and a data center than uses software to build a virtual topology is an SD-DC, and a storage product that uses software to emulate traditional hardware storage products is SD storage, and a network where the control plane has been pulled into some sort of controller an SDN, aren’t my profile on LinkedIn, and my twitter username @rtggeek software defined people (SDP)? A related question — if there are already IoT vendors, and the IoT already has a market, can we declare the hype cycle dead and move on with our lives? Or is hype too useful to marketing folks to let it go that easily? One thing we do poorly in the networking world is define things. We’re rather sloppy about the language we use — and it shows.
Back on topic, but still to the point — maybe it’s time to rethink the way we use the phrase software defined. Does SD mean one thing emulating another? Does SD mean centralized control? Does SD mean software controlled? Does SD mean separating the control plane from the data plane? Does SD mean OpenFlow?
IPv6 Implementation Guide: It’s Go Time
The time is now to deploy IPv6. Our guide covers protocol basics, IPv6 benefits, how to plan a dual-stack deployment, potential security issues and how to learn more.SDN Internet Router Is in Production on Software Gone Wild
You might remember the great idea David Barroso had last autumn – turn an Arista switch into an Internet edge router (SDN Internet Router – SIR). In the meantime, he implemented that solution in production environment serving high-speed links at multiple Internet exchange points. It was obviously time for another podcast on the same topic.
Read more ...Show 259: Don’t Forget The Basics
In Packet Pushers Weekly Show #259 (two hundred and fifty nine, really?), Greg Ferro and Ethan Banks have a wide ranging discussion about several different things that have been on their minds. Perhaps the biggest idea in this discussion is "Don't forget the basics."
The post Show 259: Don’t Forget The Basics appeared first on Packet Pushers.
Dell/EMC Deal Puts Crosshairs on HP. Who Else?
With layoffs and upcoming split, HP should be sweating this mega-merger, one analyst believes.
BTI Integrates NFV Capability Into Its Optical Platform
Service providers can use BTI's optical platform to also virtualize some central office functions.
Would I take Wireshark training?
If the buck stops with you when it comes to troubleshooting strange and bizarre application behavior, you’ll want to be able to use a packet capture tool effectively. Wireshark is ubiquitous; most network engineers use it. Wireshark has an active user and development community. Plus, there is a commercial variant through Riverbed if you care to go that route. Therefore, I view Wireshark as a safe packet analysis tool to spend time learning intimately.PQ Show 60: The IO Visor Project And Linux Networking
IO Visor is an open source project to bring a programmable data plane to the Linux kernel. We find out how it works and how it compares to other projects to optimize Linux for networking.
The post PQ Show 60: The IO Visor Project And Linux Networking appeared first on Packet Pushers.
What’s inside your containers? Why visibility and control are critical for container security
This vendor-written tech primer has been edited by Network World to eliminate product promotion, but readers should note it will likely favor the submitter’s approach.
As organizations turn to containers to improve application delivery and agility, the security ramifications of the containers and their contents are coming under increased scrutiny.
Container providers Docker, Red Hat and others are moving aggressively to reassure the marketplace about container security. In August Docker delivered Docker Content Trust as part of the Docker 1.8 release. It uses encryption to secure the code and software versions running in Docker users’ software infrastructures. The idea is to protect Docker users from malicious backdoors included in shared application images and other potential security threats.
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