Show 359: Juniper And The Self-Driving Network (Sponsored)
Juniper Networks joins the Packet Pushers on this sponsored podcast to talk about Juniper's vision of the Self-Driving Network to bring more automation, efficiency, and security to the network. The post Show 359: Juniper And The Self-Driving Network (Sponsored) appeared first on Packet Pushers.
Is Serverless Finally Ready for the Enterprise? Stackery Thinks So
The initial platform support is tied to AWS Lambda, but Azure Functions is on the schedule.
my.ipSpace.net outage: fixing broken libraries
An update of PERL libraries broke a number of my scripts (don't ask). Here's the current status:
- Fixed: credit card processing. It was impossible to buy products from ipSpace.net with credit cards (the credit card form didn't appear at all)
- Fixed: Google+ login
- Unrelated and fixed: blog search
Anything else not working? Please write a comment or send me an email. Thank you!
Your Network: The Glue Holding the Business Together (Thwack)
TCP congestion control, buffer bloat and micro bursting are just a few of the things that can ruin your network and, as a consequence, your business.
On the Solarwinds Thwack Geek Speak blog I looked at these issues and more, examining the elements that make up network performance. Please do take a trip to Thwack and check out my post, “Your Network: The Glue Holding the Business Together“.
Please see my Disclosures page for more information about my role as a Solarwinds Ambassador.
If you liked this post, please do click through to the source at Your Network: The Glue Holding the Business Together (Thwack) and give me a share/like. Thank you!
Viptela SD-WAN Solution – Cisco Systems Company
Before starting with the SD-WAN solution. I would like to talk about Fabric a little bit, So Fabric is a cloud delivered network that is secure, scalable, open and simple to deploy and if we talk about the Viptela Fabric solution, it enables an Enterprise to extend its network footprint to all infrastructure elements using a single platform. This includes branches, campus, remote sites, Cloud and data center.
What is the basic feature of the Fabric enabled SD solution ?
So SD-WAN so called Software Defined WAN solution, where control plane or management plane is separated from the physical devices, while in the Viptela solution we have following architecture, where we have data-plane on the physical devices (obviously), Control Plane by VSmart or VBond Management tool, Management Plane via VManage and Orchestration plane.
So below is the high level architecture view of the Viptela Managed SD-WAN solution
What is the basic feature of the Fabric enabled SD solution ?
So SD-WAN so called Software Defined WAN solution, where control plane or management plane is separated from the physical devices, while in the Viptela solution we have following architecture, where we have data-plane on the physical devices (obviously), Control Plane by VSmart or VBond Management tool, Management Plane via VManage and Orchestration plane.
So below is the high level architecture view of the Viptela Managed SD-WAN solution
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| Fig 1.1- Viptela SD-WAN Solution |
The traditional WAN challenge is to connect various sites, branches, stores, remote-locations, campuses and DCs. This network to be sophisticated with routing, path selection, security, segmentation etc.
Connectivity to the cloud
In the today's era everyone wants to connect to the cloud and want to access the application on the Continue reading
What is Deadlock situation in MPLS Traffic Engineering ?
What is deadlock situation in MPLS Traffic Engineering ? What happens when deadlock occurs ? Is there any mechanism to prevent deadlock ? I will explain all the details in this post. Deadlock occurs when LSP needs to move to the other link but due to lack of available bandwidth cannot move to […]
The post What is Deadlock situation in MPLS Traffic Engineering ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Code Everywhere: Why We Built Cloudflare Workers
It all comes down to the speed of light. It always does. The speed of light limits the latency possible between someone using the Internet and the application they are accessing. It doesn’t matter if they are walking down the street hailing a car using a ride-sharing app, sitting in an office accessing a SaaS application on the web, or if their wearable device is reporting health information over WiFi. The speed of light is everywhere.
When you can’t fight the speed of light you only have one possible solution: move closer to where the end users are. In simplistic terms, that’s what Cloudflare has done by building its network of 117 data centers around the world. We’ve cut the latency between users and servers by moving closer.
The Missing Link
But to date all we’ve moved closer are things like SSL handshakes, WAF processing of requests and caching of content. All those things help make Internet applications faster and safer, but there’s a huge missing component... code.
The code that makes Internet applications work is still sequestered in servers and cloud services around the world. And there are only a limited number of such locations even for large cloud Continue reading
Introducing Cloudflare Workers: Run Javascript Service Workers at the Edge
TL;DR: You'll soon be able to deploy Javascript to Cloudflare's edge, written against an API similar to Service Workers.
Try writing a Worker in the playground »
Introduction
Every technology, when sufficiently complicated, becomes programmable.
You see this everywhere, but as a lifelong gamer, my personal favorite example is probably graphics cards. In the '90s, graphics hardware generally provided a fixed set of functionality. The OpenGL standard specified that the geometry pipeline would project points from 3D space onto your viewport, then the raster pipeline would draw triangles between them, with gradient shading and perhaps a texture applied. You could only use one texture at a time. There was only one lighting algorithm, which more or less made every surface look like plastic. If you wanted to do anything else, you often had to give up the hardware entirely and drop back to software.
Of course, new algorithms and techniques were being developed all the time. So, hardware vendors would add the best ideas to their hardware as "extensions". OpenGL ended up with hundreds of vendor-specific extensions to support things like multi-texturing, bump maps, reflections, dynamic shadows, and more.
Then, in 2001, everything changed. The first GPU with a programmable Continue reading
WAN Optimization ( Silver Peak Vs Riverbed)
In today's world WAN optimisation is one of the critical pillar of the enterprise network and there are so many vendors working on the WAN optimization products. Cisco came with WAAS solution but not able to convince customers in the market. Riverbed and SilverPeak are the major leaders in the WAN optimization market.
Silver top’s WAN acceleration solution facilitates firms achieve the rewards of virtualization by means of overcoming network challenges that impact the overall performance of these packages throughout the WAN. extra especially, Silver height addresses latency, packet loss, and bandwidth demanding situations that cause digital packages (e.g. Citrix Xen App) and digital desktop Infrastructures (e.g. Citrix Xen computer, Microsoft computer Virtualization, and VMware VDI) to be unresponsive and/or unreliable across the WAN.
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| Fig 1.1- WAN Optimization |
How does Silver height fluctuate from other WAN acceleration carriers with regards to optimising digital applications and computer systems?
Many WAN acceleration vendors, including Silver Peak, offer “basic” optimization techniques that can improve the performance of Citrix and VDI. These include standard compression algorithms (e.g. LZ) and well-established TCP acceleration techniques (e.g. adjustable window sizes and selective acknowledgements).
However, that is where the similarities end. In addition Continue reading
Datacenter Switching : Nexus ( FEX: Fabric Extenders )
Today I am going to talk about the FEX that you generally heard when you are going to connect your datacenter servers in the Nexus Switching environment. It is called as Bridge Port Extension. It means there is a Parent Switch and the port of that parent switch get connected to FEX( that is another Switch) but act as the Interface card for the Parent switch.
- Parent Switch :Nexus 5K or Nexus 7K
- FEX:Nexus 2K ( Another Switch but interconnected with Parent Switch and controlled)
Nexus 7K or 5k is act as Parent Switch but Nexus 2K act as FEX for Parent Switch. So all the function of the Nexus 2K is controlled by the Parent Switch and that is Nexus 7K or 5K. Simply says that Nexus 2000 Series FEX behaves logically like Remote line cards for parent Nexus 5K or 7K Nexus Switch.
Lets talk how we can connect the FEX with the parent switch in the datacenter environment.
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| Fig 1.1- FEX Connectivity |
Let's talk about the basic Configurations to configure the FEX.
Step-1 :Enable the FEX feature
N5K-1(config)# feature fex
Step-2 :Create a FEX instance (Note: Its up to you to choose Continue reading
Linux for Networking Pros: NOS Demo
In this video, David Bombal shows you how to use Linux commands on three network operating systems.
NMAP Quick Reference
NMAP quick reference guide.NMAP Quick Reference
NMAP is a tool for network discovery and auditing. This is not a comprehensive tutorial, only a quick reference source. Consult the man pages and/or documentation for indepth explanation of commands. Port Scan Top Ports Scan the top N number of ports cmd nmap --top-ports 10 www.google.com UDP...NMAP Quick Reference
TCP SYN Scan TCP SYN scans do not perform a full TCP 3-way handshake. A RST is sent to the server when a SYN/ACK is received. The flow between the NMAP client and server looks like this: NMAPSERVER NMAPSYN-->SERVER NMAPSERVER NMAPSERVER ...continue reading
Microburst: Intent-Washing (See Apstra Fight Back!)
Apstra – the intent-based networking company – was thrilled, perhaps in a somewhat ironic sense, when Cisco announced just before Cisco Live 2017 US that the future was intent-based networking. I hear informally that their appointment book for meetings at Cisco Live was positively spilling over within just a couple of days. Intent-based networking had just been validated by the big guy in the room!
A few months later, and the evidence of intent-washing
is all too clear, as some other vendors have begun labeling their SDN products intent-based
so they can claim table stakes in the next big thing. In fact, I’m sure from Asptra’s perspective, Cisco was, and is, stepping on their toes too, and doing its own intent-washing to stay on message. If I were Apstra, I’d be none pleased to see my message devalued like this, but what can a company in this position do?
Apstra can fight back with a video featuring the bearded legend himself, Derick Winkworth (@cloudtoad), that’s what they can do. This is not to be missed:
This is pure gold. We shall never forget.
If you liked this post, please do click through to the source at Microburst: Intent-Washing Continue reading
Top Cyber Cops Give Security Tips for Preventing Attacks
Buy-in from management and employee training is key.