I recently came across a design in which GRE tunnels were built utilizing HSRP VIP addresses. At first I was unsure of how well this would work so as usual I decided to lab it up. It turns out that this is an excellent counter design to having to place metrics or do any type…
Archives for 2015
While SDN automates network configuration, it’s not a replacement for network or application performance monitoring tools. In fact, monitoring tools are likely to become more capable as software-driven data streams flow in from all parts of the data center.
I’ve been noticing a trend recently in enterprise networking where managers and engineers alike are more concerned (obsessed) with the physical appearance of their rack, wires, and network equipment than they are with the actual pragmatic design and stability of said network. Approx Reading Time: 3-5 Minutes A Little is Good Now a certain amount…
Citrix CPX is a NetScaler ADC that runs in a container. Currently available as a tech preview, CPX aims to make NetScaler more consumable for developers and push back against HAProxy.
Sonus VellOS controls the network based on dynamic unified communications requirements. Network resources are automatically allocated to satisfy UC demands, turning QoS into Quality of Experience.
Engineers in many industries are often scapegoats for bad or immoral executive decisions. Here’s how not to take the blame.
Facebook CEO Mark Zuckerberg’s decision to take 2 months of paternity leave may have a bigger impact than giving away $45 billion. Here’s why.
SD-WAN startup Versa Networks targets carriers & providers with an emphasis on multitenancy, scalability, and virtual network services.
Juniper plans to disaggregate its Junos switch OS from the new QFX5200 switches. The QFX5200 line will be the first from Juniper that lets customers choose to run Junos or a third-party network OS. Junos will also run on non-Juniper hardware. Juniper hasn’t yet announced third-party partners.
In this post we’ll have a look at the process of configuring a FlexVPN network (unofficially known as DMVPN phase 4). I’ll show what components are involved in configuration and how they all tie together. For most patient readers there’s a bonus at the end of this post.
Extreme Networks is rolling out new 802.11ac Wave 2 APs. Wave 2 enables greater throughput than Wave 1, and incorporates additional enhancements such as MU-MIMO.
Startup Niara applies machine learning to security logs and network packets and flows to find anomalous behavior that may indicate malicious activity.
Funny enough, much of the food you will find in Yokohama is Chinese, rather than Japanese — another odd fact you probably didn’t need to know. I’m going to cover day 4 and 5 here, as I’m leaving tomorrow morning to head back to the “real world.” Wednesday is a “slow day” in terms of…
I’ll be live blogging from ONUG for this fall 2015 session. I’m in Manhattan already, looking forward to the event that starts on Wednesday. Refresh this page periodically to see the latest updates as I glean technical data from the presentations in real-time.
Interesting observation about Japan of the day: when you press the elevator call button, the light over the elevator that will be coming next lights up. When the elevator comes, the light flashes as the doors open. Minor thing, I know, but I’m easily amused. 🙂 Today I went to the SPRING, or source packet…
I’m in New York City this week to live blog the Open Networking User Group (ONUG) Fall 2015 conference and cover a Tech Field Day Extra.
A list of default TCP port numbers for contemporary applications such as Docker, Elastic, OpenStack and Puppet. Why? Whenever I’m trying to identify an application by port number, the usual online sources are often still giving me details on AltaVista Web Server and the like. In the oh so hip and cutting edge DevOps environments I live…
Note to readers: I’m currently at the IETF in Yokohama; each day I’m going to try to post something about the days events y’all might find interesting. I don’t know why, but the faucet knobs in my hotel room seem to rotate backwards. I’m forever turning the water off when I mean to turn it…
End user WiFi monitoring complements standard network monitoring and can speed up problem detection and troubleshooting. NetBeez shares the top four use cases in wireless monitoring from the user perspective.
Note to readers: I’m currently at the IETF in Yokohama; each day I’m going to try to post something about the days events y’all might find interesting. Sunday night — arrived at Yokohama around one in the afternoon after 16+ hours in flight, plus layovers, a one and a half hour bus ride, and then…
William Gibson is working at the height of his abilities in The Peripheral. Characters move back and forth between near present-day and an unusual post-apocalyptic future, and the book blends high-tech, visionary showpieces with themes of class, opportunity, and economic injustice.
The startup NS1 offers a managed DNS service to accelerate the delivery of Web and mobile content for its customers. It collects network and system telemetry to make intelligent routing decisions.
Next week, the Packet Pushers will be recording a podcast live in front of a crowd in NYC. We’ll be talking SD-WAN deployment with Viptela customers who have been actively rolling out the solution. With this show, we want to move from “what is SD-WAN?” to “how is SD-WAN working for you?” Sign up to attend this event here:
I’ve recently been working on an implementation of Virtual Router Redundancy Protocol (VRRP) on Linux using Keepalived to provide IP redundancy for some HA Proxy load balancers. I’ve been pleasantly surprised by how simple and easily deployed it is and thought I’d share the details now I understand why it’s the default choice for many. Keepalived was created…
Packet Pushers took on an SD-WAN whitepaper sponsored by CloudGenix. There were two main ideas behind this whitepaper. (1) Describe a typical SD-WAN solution. (2) Discuss CloudGenix specifics. When done reading, you should know both what SD-WAN will do for you, as well as how to integrate CloudGenix into your existing WAN with a minimum of disruption. Download with no regwall from here: http://bit.ly/PPCGWP.