SWITCH Stories

Mellanox Challenges Imposter Open Source Vendors With SONiC

Published on: 2019-09-25

Mellanox Technologies today announced support for the SONiC networking operating system on its Ethernet switches. The chipmaker jointly developed the open source network OS based on Linux with Microsoft, Arista, Broadcom, and Dell, and the companies contributed it to the Open Compute Project in ...

5G Transforms Vertical Industries

Published on: 2019-09-25

With more and more 5G networks up and running every month, and commercial 5G services now available in multiple markets, mobile operators are turning their attention to seeking out new business opportunities that can help deliver the best return on their investments and make the most of their ...

HPE's vision for the intelligent edge

Published on: 2019-09-06

It’s not just speeds and feeds anymore, it's intelligent software, integrated security and automation that will drive the networks of the future. That about sums up the networking areas that Keerti Melkote, HPE's president, Intelligent Edge, thinks are ripe for innovation in the next few years. ...

Q&A: HPE's networking chief opens up about intelligent edge, Cisco and micro data centers

Published on: 2019-09-05

Since founding Aruba Networks in 2002 and then staying on when Hewlett Packard bought the firm in 2015, Keerti Melkote has seen firsthand the evolution of the wireless industry. From the initial rush to bring laptops using Wi-Fi to the enterprise and the advent of Apple iPad – which Melkote says ...

VMware touts hyperscale SD-WAN

Published on: 2019-08-28

SAN FRANCISCO – VMware teamed with Dell/EMC this week to deliver an SD-WAN service that promises to greatly simplify setting up and supporting wide-area-network connectivity. The Dell EMC SD-WAN Solution is a package of VMware software with Dell hardware and software that will be managed by Dell ...

VMware touts hyperscale SD-WAN

Published on: 2019-08-28

SAN FRANCISCO – VMware teamed with Dell/EMC this week to deliver an SD-WAN service that promises to greatly simplify setting up and supporting wide-area-network connectivity. The Dell EMC SD-WAN Solution is a package of VMware software with Dell hardware and software that will be managed by Dell ...

Cisco Reports Fourth Quarter and Fiscal Year 2019 Earnings

Published on: 2019-08-14

SAN JOSE, Calif., Aug. 14, 2019 -- Cisco today reported fourth quarter and fiscal year results for the period ended July 27, 2019. Cisco reported fourth quarter revenue of $13.4 billion, net income on a generally accepted accounting principles (GAAP) basis of $2.2 billion or $0.51 per share, and ...

Best mesh Wi-Fi routers: Reviews and buying advice

Published on: 2019-05-10

A great wireless router is an essential element of tech life, whether you’re building out a smart home or you just want the best experience streaming music and video at home. If you’re suffering with low wireless throughput or dead spots in any area of your home, we heartily recommend deploying ...

GORUCK D-Day Tough - AAR

Published on: 2019-09-24

rd Tough. My two oldest kids and I drove over Saturday evening and parked close to the start point. We were slated to start at 10PM so were happy to be in place around 9 so get changed and geared up. This event was something we were looking forward to for multiple reasons. First, GORUCK events ...

CIMC Upgrade – WLC in HA

Published on: 2019-09-20

In this post we will look at CIMC upgrade process of WLC HA pair. If you have not deployed WLC in HA -SSO (High Availability with Stateful Switch Over) it is high time to think about it. If you have standalone WLC deployment , then you require to get longer outage window (1 hr+ ) to perform this ...

Have Lots of Unused or Free Disk Space on your Mac

Published on: 2019-09-19

TL-DR: Mac was performing badly, cleared a lot of disk space and found buttery smooth nirvana for the glorious price of free. My Late 2015 iMac has been grinding lately. I’m not quite ready to upgrade so I bought more memory. Yes, I’m one of those people that buys a machine with lowest memory, ...

A Review of Huawei 5G CPE Pro

Published on: 2019-09-10

Recently, Huawei 5G CPE Pro is very hot in the 3C market. This 5G WiFi router said it can help us enjoy 21 times speed than 4G. Is it real? Today I am going to share you a Use evaluation from a Chinese article. The body of Huawei 5G CPE Pro is a 107mm × 100mm × 215mm square tower. The top and ...

IT Hero Culture

Published on: 2019-09-06

I’ve written before about rock stars and IT super heroes. We all know or have worked with someone like this in the past. Perhaps we still do have someone in the organization that fits the description. But have you ever stopped to consider how it could be our culture that breeds the very people ...

Quick VPN Installation Guide on Your Router

Published on: 2019-09-04

Having your own VPN, or virtual private network is growing in popularity. With so many hacks and data breaches taking place every day, maintaining certain levels of security is important. That’s why having a VPN is key. What is so important about a VPN? A VPN provides total privacy because your ...

Positioning Policy Properly

Published on: 2019-08-30

Who owns the network policy for your organization? How about the security policy?Identity policy? Sound like easy questions, don’t they? The first two are pretty standard. The last generally comes down to one or two different teams depending upon how much Active Directory you have deployed. But ...

New Nexus 9K Items

Published on: 2019-08-22

Learn more about the Cisco Nexus 93240YC-FX2 switch, 100 Gbps fabric options, and the new alternative VPC with fabric peering. The post New Nexus 9K Items appeared first on NetCraftsmen.

AWS ABCs: Granting A Third-Party Access to Your Account

Published on: 2019-08-20

There can be times when you’re working on the AWS Cloud where you need to grant limited access to your account to a third-party. For example: In each of these cases you likely want to grant the permissions the third-party needs but no more. In other words, no granting of policies because it’s ...

Netlify Migration

Published on: 2019-08-18

This blog is now hosted via Netlify, rather than GitHub Pages. It is still built using Jekyll, but I updated the theme to Mediumish. I looked at switching to Hugo for site generation, but I hit several bugs trying to do the import, and theme setup was a pain. So I stuck with Jekyll, because it’s ...

Automating cleaning up NSX-T with PKS protected objects

Published on: 2019-08-15

Building on the post that Jeffrey Kusters did on removing protected objects from NSX-T that PKS has created, I needed to automate this process for an environment which had 100+ of these objects. First, a tiny bit of background; VMware PKS makes it pretty easy to deploy applications via ...

Cisco Live 2019 – A Whirlwind of Networking Goodness

Published on: 2019-06-24

Cisco Live 2019 came and went in a whirlwind of fantastic meetups, excellent sessions, and genuinely nerdy networking conversations. Cisco Live session content was top notch. Jasper Bongertz’s Wireshark talk blew the audience away with useful packet capture and troubleshooting tips, and Denise ...

Cranky Old Network Engineer Complains About The Youth Of Today

Published on: 2019-06-20

If you’re very old (like me) you’ll likely remember the halcyon days when IP routing was not enabled by default on Cisco routers. Younger gamers may find this hard to believe, which makes it even stranger when I keep bumping into an apparently common misconception about how routers work. Let’s ...

CCDE Thoughts After Cisco Live 2019

Published on: 2019-06-18

My CCDE Thoughts After Cisco Live 2019The CCDE exam was conspicuously absent from the grand re-imagining of the CCNA/CCNP/CCIE certification programs. Here's a brief summary of the announcements (everything takes effect on February 24, 2020):CCIE Routing & Switching is being renamed to CCIE ...

StackWise Virtual on Catalyst 9500

Published on: 2019-06-12

During the Cisco Live 2016 in Las Vegas, Cisco presented the new feature named “StackWise virtual” supported by the IOS XE Denali in the 3850 switch series and later, in the new Cisco Catalyst 9500 family. Similarly to the old Virtual Switching System (VSS), the stackwise virtual allows the ...

Meraki In The Middle – Smart Security Cameras

Published on: 2019-06-12

I’ve been looking at security cameras recently, in part because my home owners association needs to upgrade the system which monitors some of the amenities. We want motion detection features and, obviously, remote access to view live cameras and recorded footage without having to go to the ...

Seven things to know to make Hyperflex go – Cisco HyperFlex Best Practices

Published on: 2019-05-26

You have Cisco Hyperflex installed, but not quite sure if there is anything you need to do differently now that want to deploy VMs on the Hyperflex Data Platform (HXDP) Well, yes there are some things that you need to do differently, and some you should do differently, but most activities you’ve ...

Critical SSH flaw affects Nexus 9000

Published on: 2019-05-06

The first of May, Cisco has revealed that its Nexus 9000 fabric switches have a critical flaw that could allow anyone to remotely connect to a vulnerable device using Secure Shell (SSH) and control it with root user privileges. Discovered and reported by Oliver Matula of ERNW Enno Rey Netzwerke ...

Network Design and Validation: IT Matters

Published on: 2019-04-29

With the complexity of our industry, two things should be obviously necessary. These two things are Network Design and Validation Testing. Design requires identifying the requirements of the business and of dependent systems. This could include things like minimum bandwidth, maximum jitter, ...

3 Challenges for Network Engineers Adopting Ansible

Published on: 2019-03-14

Ansible, ansible, ansible seems to be all we hear these days. There are lots of resources out there all trying to convince us this is the new way get stuff done. The reality is quite different – adoption of tools like this is slow in the networking world, and making the move is hard for ...

Cisco Live – Network Building Blocks for IoT

Published on: 2019-03-07

Cisco Live happened in Barcelona end of January, and as usual I am a little late with my blog posts about it. Like the last two years I was invited to join the group of technology experts for Tech Field Day Extra, with various presentations covering a number of new and improved Cisco ...

SnapRoute - Is there something new happening in networking?

Published on: 2019-03-04

The launch (or relaunch depending on your opinion of when they started and on what they were building verse what they are doing now) of SnapRoute was an interesting event to be able to participate in. SnapRoute presented at Network Field Day 20 as part of the launch of their Cloud Native Network ...

A Discussion On Storage Overhead

Published on: 2019-01-28

For various types of communications protocols, ranging from Ethernet to Fibre Channel to SATA to PCIe, there’s typically additional bits that are transmitted to help with error correction, error detection, and/or clock sync. These additional bits eat up some of the bandwidth, and is referred to ...

Juniper RADIUS-delivered switching filters

Published on: 2018-11-06

I’ve been experimenting with getting RADIUS to deploy switching filters to Juniper switches recently, as part of a reference architecture demo. The concept is called REACH2020 and combines network virtualisation with the ability to identify network users and devices so that categories of user ...

Cisco WLC for Wired to Wireless mDNS and Bonjour

Published on: 2018-10-31

Bonjour and mDNS are discovery mechanisms that generally work effortlessly within a single VLAN. Those attempting to implement these protocols in a multi subnet environment often run into some significant challenges. The typical use of CAPWAP in an enterprise wireless network adds to the ...

Installing Moloch on Debian 9 Stretch

Published on: 2018-10-31

Moloch is a tool that builds on Elasticsearch to process large numbers of network packets, either from a live network or from imported PCAP files. This is how I installed it on a Debian 9 server. Installing Moloch turned out not to be exactly easy when I prepared my Sharkfest 2018 Talk “The ...

The Ethertype value, part 1

Published on: 2018-09-17

All data being sent on an Ethernet based network is encapsulated in a “frame”. This frame has a minimum size of 64 and a maximum size of 1518 bytes. Some of the space is however used by Ethernet itself. At the end of each frame we will find a 4 byte checksum called FCS. This checksum is ...

App-V: Office 365 Pro Plus and SAP EPM COM Add-in loading issue

Published on: 2018-09-04

In the past months I have been working and supporting building a Windows 10 1709 image, updating core applications and upgrading App-V software packages. The client migrations are now ongoing where several issues have pop-up during the switch from Windows 7 to Windows 10. New Office 365 Pro Plus ...

Cisco OpFlex

Published on: 2018-06-13

Cisco ACI uses OpFlex to communicate with VMWare DVS/VDS. OpFlex is an extensible policy protocol designed to exchange abstract policy between a network controller and a set of smart devices capable of rendering policy. OpFlex relies on a separate information model understood by agents in both ...

Syslog relay with Scapy

Published on: 2017-11-11

I needed to point some syslog data at a new toy being evaluated by security folks.Reconfiguring the logging sources to know about the new device would have been too much of a hassle for a quick test. Reconfiguring the Real Log Server (an rsyslog box) to relay the logs wasn't viable because the ...

Arista's Programmability Strategy

Published on: 2017-10-01

Arista is largely known for its operating system, best known as EOS. Arista has been known to deploy new features at a more rapid pace than other vendors and to have a more open OS–since EOS was the first production-grade network network operating system to expose any form of Linux to end users. ...

Pluribus Networks... Wait, where are we again?

Published on: 2017-09-26

I was privileged to visit Pluribus Networks as a delegate at Network Field Day 16 a couple of weeks ago. Somebody else paid for the trip. Details here.Much has changed at Pluribus, I hardly recognized the place!I quite like Pluribus (their use of Solaris under their Netvisor switching OS got me ...

What Drives Change in Enterprise IT

Published on: 2017-08-30

Reason For Change in Enterprise IT: Obsolescence You may love your Catalyst 6500 with SUP32 supervisors. They still meet all the requirements of your network: gigabit to the user, routing protocols, security capabilities. Unfortunately, Cisco has made it clear that they no longer want to support ...

SDN Lesson #2 – Introducing Faucet as an OpenFlow Controller

Published on: 2017-03-07

Welcome back to a new article about SDN - this time introducing an OpenFlow controller called Faucet, developed as a RYU application by New Zeeland Research and Education (REANNZ), Waikato University and Victoria University. In this article, I am not going to write about Faucet's architecture ...

L3 fabric DC -The underlay Network (BGP) -part2

Published on: 2017-01-17

In the previous post, we laid the foundation of L3 fabric DC In this post we will discuss the underlay network which mainly provide IP reachability plus ECMP capability, here BGP would play a role in your DC next to the 3 other that we discussed one of the previous posts. For the sake of ...

Three Months with Google Fiber

Published on: 2017-01-06

I'm one of the lucky few to benefit from Google Fiber's recent expansion into new regions (before they nixed the whole thing). I've had the service fire three months now and figured I should write up my experience with it thus far. Google Fiber announced that it would be expanding to the ...

L3 fabric DC -The underlay Network -Part1

Published on: 2016-12-07

In the previous posts we have discussed the classic DC designs and the M-LAG solution. In this post we will cover the basic L3 fabric DC, you might never heard of it or you think that’s a solution for massive scale DC, yes the massive DC in the world would be running L3 fabric but nowadays more ...

The Overlay Problem: Getting In and Out

Published on: 2016-09-30

I've been researching overlay network strategies recently. There are plenty of competing implementations available, employing various encapsulations and control plane designs. But every design I've encountered seems ultimately hampered by the same issue: scalability at the edge. Imagine a ...

Classic DC and M-LAG

Published on: 2016-08-29

In the pervious post we talked about BGP in Data Center and how it is a topic of discussion in between the DC and the SP arenas. In this post I will start explaining some classic DC design and laying its shortage which will engage the SP gurus with us, as well it will make sure that we all on ...

MACsec Implementation on Linux

Published on: 2016-08-01

As you noticed from the previous articles, lately I have been playing with some various tunnelling techniques and today I am presenting MACsec. Most of the documentation resources about MACsec implementation on the web at this moment, are the ones showing various vendors implementation, ...

Performance Review of Overlay Tunnels with Open vSwitch

Published on: 2016-07-11

In my previous article I presented various encapsulation techniques used to extend Layer 2 reachability across separate networks using tunnels created with Open vSwitch. Although the initial intention was to include some iperf test results, I decided to leave these for a separate post (this ...

Overlay Tunneling with Open vSwitch - GRETAP, VXLAN, Geneve, GREoIPsec

Published on: 2016-07-07

Building overlay networks using tunnels was always done to achieve connectivity between isolated networks that needed to share the same policies, VLANs or security domains. In particular, they represent a strong use-case in the data center, where tunnels are created between the hypervisors in ...

Configuring Macvlan and Ipvlan Linux Networking

Published on: 2016-03-28

Macvlan and Ipvlan are both Linux type networking interfaces that are both supported by the Linux kernel. They are unique for a few different reasons. One thing that makes them both very attractive is they do not use bridges in their implementation and natively namespace aware. It solves some ...

Time to Ditch the Definition of SDN

Published on: 2015-08-16

While at a stoplight looking at the random news feeds on Linkedin I ran across a post of a recent blog post by the ONF and the subsequent conversation where my friend Ivan Pepenlnjak commented. So I threw in my two cents and quickly regretted it because Linkedin has an amazing ability to ...

It's Dirty Work, But Somebody's Gotta Do It

Published on: 2015-02-14

Network Engineers are known to have to work in dirty places like under desks, janitors closets (err I mean network closets), and those weird spaces in mechanical rooms in which someone decided to hide a switch or two.  Nothing though in networking compares with some of the jobs that this year's ...

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