A Universal Snap Works Across All Linux Distributions
Canonical contributed the initial code for the snap.
Is It Real, or Is It Cumulus VX?
Phew! Cumulus Linux 3.0 has just been released! A big shout out to all of my engineering colleagues who worked so hard to make this happen. JR Rivers gave an overview of all the goodies included in 3.0 in his recent blog post. Stay tuned for more blog posts from other engineers for details on all of those new features.
But Cumulus Linux isn’t the only beneficiary of all the 3.0 work. Cumulus VX, our free virtual machine-based version of Cumulus Linux, also has some pretty cool new tricks. When we launched Cumulus VX last August we thought it would be a way for people to get hands on with a Linux-based switch operating system, in their own environment and without any commitment. Boy, Were we surprised at how it quickly became so much more. With over 3,800 unique users, Cumulus VX is being deployed in all sorts of ways we never dreamed of. As just one example, existing customers are using it to validate their configurations before upgrading their physical switches from one release to another.
What’s New?
And that brings me to the first change we’ve made: concurrent releases. Our plan from now on Continue reading
Worth Reading: The end of the hypervisor
The post Worth Reading: The end of the hypervisor appeared first on 'net work.
What is flow-based load balancing ?
Flow-based load balancing is used mostly in layer 2 networks, although in Layer 3 routing, packets can be load balanced per packets or per flow, flow-based load balancing is commonly used with the Local area network, datacenter and datacenter interconnect technologies. There are two important load balancing mechanisms in layer 2. Vlan-based load balancing and […]
The post What is flow-based load balancing ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
No Capes, No Wands
As a keen observer of the network engineering world for the last twenty… okay, maybe longer, but I don’t want to sound like an old man telling stories quite yet… years, there’s one thing I’ve always found kind-of strange. We have a strong tendency towards hero worship.
I don’t really know why this might be, but I’ve seen it in Cisco TAC—the almost hushed tones around a senior engineer who “is brilliant.” I’ve seen it while sitting in a meeting in the middle of an argument over some technical point in a particular RFC. Someone says, “we should just ask the author…” Which is almost always followed by something like: “Really? You know them?”
To some degree, this is understandable—network engineering is difficult, and we should truly honor those in our world who have made a huge impact. In many other ways, it’s unhelpful, and even unhealthy. Why?
First, it tends to create an “us versus them,” atmosphere in our world. There are engineers who work on “normal” networks, and then there are those who work on, well, you know, special ones. Not everyone needs those “special skills,” so we end up creating a vast pool of people Continue reading
Barefoot Networks Just Raised Another $57M
Also: Why networking should follow the example of graphics chips
What does PE-CE mean in MPLS ?
What does PE-CE mean in the context of MPLS ? What is CE , P and PE device in MPLS and MPLS VPN ? These are foundational terms and definition in MPLS. MPLS is one of the most commonly used encapsulation mechanism in Service Provider networks and before studying more advanced mechanisms, this article is […]
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The Case for the 25GbE Access Layer
The 10GbE network interface card is rarely the bottleneck on the average enterprise host. So who needs 25GbE? The answer is about what you will need tomorrow versus what you do need today.
The post The Case for the 25GbE Access Layer appeared first on Packet Pushers.
Merchant silicon based routing, flow analytics, and telemetry
The router market is poised to be similarly disrupted with the introduction of devices based on Broadcom's Jericho ASIC, which has the capacity to handle over 1 million routes in hardware (the full Internet routing table is currently around 600,000 routes).
An edge router is a very pricey box indeed, often costing anywhere from $100,000 to $200,000 per 100 Gb/sec port, depending on features in the router and not including optical cables that are also terribly expensive. Moreover, these routers might only be able to cram 80 ports into a half rack or full rack of space. The 7500R universal spine and 7280R universal leaf switches cost on the order of $3,000 per 100 Gb/sec port, and they are considerably denser and less expensive. - Leaving Fixed Function Switches Behind For Universal LeafsBroadcom Jericho ASICs are currently available in Arista 7500R/7280R routers and in Cisco NCS 5000 series routers. Expect further disruption Continue reading