Who Controls The Internet?
The title of the paper Who controls the Internet? Analyzing global threats using property traversal graphs is enough to ensnare any Internet researcher. The control plane for a number of attacks, as the paper points out, is the DNS due to the role it plays in mapping names to resources. MX records in the DNS control the flow of mail, CNAME records are used to implement content delivery networks (CDN) services, and TXT records are used to confirm access to and control over a namespace when implementing third party services. This post will cover an interesting case where control is exercised first via the DNS and then using BGP.
Below the DNS, in the depths of internet plumbing, is the lizard brain of internet routing, which is governed by the border gateway protocol (BGP). A common term to describe BGP routing is “hot potato” routing. BGP conversations occur between autonomous systems, ASes, which are identified by their autonomous system number ASN. The ASN represents a system of networks and the policy associated with their routing. ASes are issued regionally by Regional Internet Registries (RIRs), which receive blocks of AS numbers to hand out from the Internet Assigned Numbers Authority Continue reading
OpenPower, Efficiency Tweaks Define Europe’s DAVIDE Supercomputer
When talking about the future of supercomputers and high-performance computing, the focus tends to fall on the ongoing and high-profile competition between the United States with its slowly eroding place as the kingpin in the industry and China and the tens of billions of dollars that the government has invested in recent years to rapidly expand the reach of the country’s tech community and the use of home-grown technologies in massive new systems.
Both trends were on display at the recent International Supercomputing Conference in Frankfurt, Germany, where China not only continued to hold the top two spots on the …
OpenPower, Efficiency Tweaks Define Europe’s DAVIDE Supercomputer was written by Nicole Hemsoth at The Next Platform.
Measuring Router Performance Using Netscout OptiView XG
In this video, Tony Fortunato describes testing the throughput of Ubiquiti EdgeRouterX.
IPv6 Link-Local Addresses and VLAN Interfaces
One of my readers sent me an email that’s easiest paraphrased into: “Why can’t I have a different IPv6 link-local address (LLA) on every access port connected to a VLAN interface?”
There’s probably nothing stopping someone from implementing such an approach, but it would go against the usual understanding of how bridging and routing interact in L2+L3 switches.
Read more ...Interface basics on the Juniper MX
I’ve been spending more time on the MX recently and I thought it would be worthwhile to document some of the basics around interface configuration. If you’re like me, and come from more of a Cisco background, some of configuration options when working with the MX weren’t as intuitive. In this post, I want to walk through the bare bone basic of configuring interfaces on a MX router.
Basic L3 interface
ge-0/0/0 {
unit 0 {
family inet {
address 10.20.20.16/24;
}
}
}The most basic interface configuration possible is a simple routed interface. You’ll note that the interface address is configured under a unit. To understand what a unit is you need to understand some basic terminology that Juniper uses. Juniper describes a physical interface as an IFD (Interface Device). In our example above the IFD would be the physical interface ge-0/0/0. We can then layer one or more IFL (Interface Logical) on top of the IFD. In our example the IFL would be the unit configuration, in this case ge-0/0/0.0. Depending on the configuration of the IFD you may be able to provision additional units. These additional units (Logical interfaces (IFLs)) Continue reading
Docker for the SysAdmin Webinar Q&A
On June 27th I presented a webinar on “Docker for the SysAdmin”. The webinar was driven by a common scenario I’m seeing: A sysadmin is sitting at her desk minding her own business when a developer walks in and says “here’s the the new app, it’s in a Docker image. Please deploy it ASAP”. This session is designed to help provides some guidance on how sysadmins should think about managing Dockerized applications in production.
In any case, I was a bit long-winded (as usual), and didn’t have time to answer all the Q&A during the webinar (and there were quite a few).
So, as promised, here are all the questions from that session, along with my answers. If you need more info, hit me up on Twitter: @mikegcoleman
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Q: I am planning an application deployment and want to use Docker. What cloud would you recommend at the moment? I have GCP, Azure, AWS under my belt. 1) TCO 2) Performance ?
A: Answering that would require me to understand your application on a pretty deep level, so I can’t really provide a specific response. I will say that if you choose one cloud provider today, and realize that Continue reading
Network Break 143: Broadcom Acquisition OK’d; Mellanox Announces New ASICs
Broadcom wins FTC approval for its Brocade buy, Cisco gets FTC help around Fibre Channel, Mellanox announces 400G ASICs, and other tech news on the latest Network Break podcast. The post Network Break 143: Broadcom Acquisition OK’d; Mellanox Announces New ASICs appeared first on Packet Pushers.
Ethernet Getting Back On The Moore’s Law Track
It would be ideal if we lived in a universe where it was possible to increase the capacity of compute, storage, and networking at the same pace so as to keep all three elements expanding in balance. The irony is that over the past two decades, when the industry needed for networking to advance the most, Ethernet got a little stuck in the mud.
But Ethernet has pulls out of its boots and left them in the swamp and is back to being barefoot again on much more solid ground where it can run faster. The move from 10 Gb/sec …
Ethernet Getting Back On The Moore’s Law Track was written by Timothy Prickett Morgan at The Next Platform.
Cloud Providers Tap Private Brokers for IPv4 Addresses
MIT recently announced it was selling about 8 million of its unused IPv4 addresses.
Microsoft Azure Stack Systems to Ship in September
Dell EMC, HPE, Lenovo, and Cisco are hardware partners.