Context From The People

Are you ready for the flood of context-based networking solutions? If not, it’s time to invest in sandbags. After the launch of Cisco’s Intuitive Network solution set at Cisco Live, the rest of the context solutions are coming out to play. Granted, some of them are like Apstra and have been doing this for a while. Others are going to be jumping on the bandwagon of providing a solution that helps with context. But why are we here and why now?

Creating Context

The truth is that we’ve had context in the network for decades now. It’s not a part number that we can order from a vendor. It’s not a command that we type into the CLI to activate. In fact, it’s nothing that you can see at all right now, unless there’s a mirror handy.

The context in networks has been provided by people for as far back as anyone can remember. You do it every day without consciously realizing it. You interpret error messages and disregard those that aren’t important. People know how to program VLANs correctly to segment traffic in certain ways. Security context, application context, and more are delivered by breathing, thinking humans.

We have Continue reading

Stuff The Internet Says On Scalability For July 21st, 2017

Hey, it's HighScalability time:

Afraid of AI? Fire ants have sticky pads so they can form rafts, build towers, cross streams, & order takeout. We can CRISPR these guys to fight Skynet. (video, video, paper)

If you like this sort of Stuff then please support me on Patreon.

 

  • 222x: Bitcoin less efficient than a physical system of metal coins and paper/fabric/plastic; #1: Python use amongst Spectrum readers; 3x: time spent in apps that don't make us happy; 1 million: DigitalOcean users; 11.6 million: barrels of oil a day saved via tech and BigData; 200,000: cores on Cray super computer;$200B: games software/hardware revenue by 2021; $3K: for 50 Teraflops AMD Vega Deep Learning Box; 24.4 Gigawatts: China New Solar In First Half Of 2017; 

  • Quotable Quotes:
    • sidlls: I think instead there is a category error being made: that CS is an appropriate degree (on its own) to become a software engineer. It's like suggesting a BS in Physics qualifies somebody to work as an engineer building a satellite.
    • Elon Musk: AI is a fundamental existential risk for human civilization, and I don’t think people fully appreciate that
    • Mike Elgan: Continue reading

Docker Community Spotlight: Adina-Valentina Radulescu

Adina-Valentina Radulescu, a DevOps/Integration Engineer for Pentalog Romania, has been organizing meetups for not one but two meetup groups.

In February of last year, Adina founded Docker Brasov and Docker Timisoara, and has since done an amazing job creating and fostering a sense of belonging in her community. This month, we’re happy to shine the community spotlight on Adina to learn more about her Docker story.

Tell us about your first experience with Docker.

The first time I heard about Docker was back in 2014. I played around with Docker and I was impressed with the simplicity of integration so I wanted to learn more. I was able to attend DockerCon EU in 2015 in Barcelona where I completed some labs and attended the talks to learn as much as I could about Docker. It was a powerful feeling.

Why did you start Docker Brasov and Docker Timisoara?

I wanted to have a Docker sharing exchange experience when I get back in Romania. I relocated from Timisoara to a beautiful mountain city, Brasov. In Timisoara, I knew people and companies. In Brasov, I knew almost no one. This is why I decided to start the two groups so I Continue reading

Worth Reading: Is Decentralized Storage Sustainable?

There are many reasons to dislike centralized storage services. They include business risk, as we see in le petit musée des projets Google abandonnés, monoculture vulnerability and rent extraction. There is thus naturally a lot of enthusiasm for decentralized storage systems, such as MaidSafe, DAT and IPFS. —DHSR

The post Worth Reading: Is Decentralized Storage Sustainable? appeared first on rule 11 reader.

OSPF Show Commands : Cisco, Juniper, Huawei, HP and Arista Networks

I am going to talk about the OSPF show commands in this article on different vendors which includes Cisco, Juniper, Huawei, HP and Arista Networks. These commands are working as per the device you have. Please let me know if you knew any other commands in general for OSPF in different platforms which includes Cisco, Juniper, Huawei, HP and Arista Networks.

Fig 1.1- Sample OSPF topology

Above is the sample topology and below are the sample OSPF show commands which will help you to troubleshoot OSPF in your network for the various platforms

Cisco OSPF show Commands
ttlbits@cisco#sh ip ospf
ttlbits@cisco#sh ip ospf data
ttlbits@cisco#sh ip ospf database database-summary
ttlbits@cisco#sh ip ospf neighbor
ttlbits@cisco#sh ip ospf nei det
ttlbits@cisco#sh ip ospf int
ttlbits@cisco#sh ip ospf virtual-links
ttlbits@cisco#sh ip ospf database self-originate
ttlbits@cisco#sh ip ospf adv-router X.X.X.X

ttlbits@cisco#sh ip ospf stat

Juniper OSPF show Commands
ttlbits@juniper> show ospf route
ttlbits@juniper> show ospf route detail
ttlbits@juniper> show ospf route extensive
ttlbits@juniper> show ospf3 route detail
ttlbits@juniper> show ospf route topology voice
ttlbits@juniper> show ospf database
ttlbits@juniper> show ospf database detail
ttlbits@juniper> show ospf database extensive
ttlbits@juniper> show ospf Continue reading

How to use Cloudflare for Service Discovery

Cloudflare runs 3,588 containers, making up 1,264 apps and services that all need to be able to find and discover each other in order to communicate -- a problem solved with service discovery.

You can use Cloudflare for service discovery. By deploying microservices behind Cloudflare, microservices’ origins are masked, secured from DDoS and L7 exploits and authenticated, and service discovery is natively built in. Cloudflare is also cloud platform agnostic, which means that if you have distributed infrastructure deployed across cloud platforms, you still get a holistic view of your services and the ability to manage your security and authentication policies in one place, independent of where services are actually deployed.

How it works

Service locations and metadata are stored in a distributed KV store deployed in all 100+ Cloudflare edge locations (the service registry).

Services register themselves to the service registry when they start up and deregister themselves when they spin down via a POST to Cloudflare’s API. Services provide data in the form of a DNS record, either by giving Cloudflare the address of the service in an A (IPv4) or AAAA (IPv6) record, or by providing more metadata like transport protocol and port in an SRV record.

Continue reading

Configuring Private VLANs on Juniper Switches

Thanks for the huge support on all my previous articles. Today I am going to talk about the Private VLANs configuration on the Juniper Switches. Earlier I wrote a article where i talk about the basics of the Private VLANs and the vendors supported to Private VLANs. If you want to have a look on that article, please go through the below mentioned link for the Private VLANs

Basics of Private VLANs

I am sure after reading the above article you will come to know about the basics of the Private VLANs. In this article I am going to cover the Configurational part of the Private VLANs on Juniper Switches, as it is demanded by some of the candidates on the blogs.

I will soon come up the configuration and the topology for the Private VLANs on Cisco and Huawei as well in another article.

A lot of people asking me about the VLANs, before starting with the configuration of the Private VLANs, let me quickly go through the VLANs and Private VLANs.

VLANs : Virtual Local Area Networks
VLANs is the way to partition the various Layer 2 network with in one Local Area Network which simply means that Continue reading

Cisco N1000v Switches

A cisco vswitch that can be used instead of the default VMware DvS to have a similar environment to that of Cisco physical NXOS switches. The control and packet communication can either be carried over VLANs in Layer2 mode or IP addresses in Layer3 mode. The default and Cisco recommended solution is L3 mode.

VMware vSphere vSwitches

Local and Distributed vSwitches server the same purpose as physical switches allowing for VM vNICs to be assigned to specific VLANs. In a production environment it is usual to define a local vSwitch on each ESX host for management and backdoor and have distributed vSwitches shared between hosts for VMs.

BIRD ROUTE SERVER INSTALL | BGP PEER WITH JUNIPER MX

I was recently faced with a challenge whereby I needed to inject 30,000 BGP routes into a test environment for a DOCSIS 3.1 POC. Typically I would use IXIA to form the BGP session and inject the routes. However, all of our IXIA testers were in use thus I needed a quick alternative.

I was already aware of BIRD and it’s use as a route server in a number of IXP environments so figured it would be a good fit. The following steps detail how to install BIRD on Ubuntu and how to instantiate a BGP session with a Juniper MX router.

For more info on BIRD check here

BIRD-BGP.png

For this install I’m using a VM running Ubuntu server 12.04LTS:

lab@ubuntu-server1:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.3 LTS
Release:        12.04
Codename:       precise

First up we need to enable Linux to support IPv4 forwarding. Two options here; we can either use the sysctl net.ipv4.ip_forward=1 command, although this setting will reset when the server is rebooted. Alternatively we can modify /etc/sysctl.conf to make the change permanent. Edit /etc/sysctl.conf and Continue reading

Worth Reading: Silicon Valley’s Overstuffed Unicorns

Here’s what’s happening: Young tech companies have been backed by unprecedented sums of investment money in the last three or four years. Those startup financiers in turn have collected record amounts of money from their own investors to buy pieces of future tech startups. All this money is going into the startup system, but it’s not coming out the other end. —Bloomberg

The post Worth Reading: Silicon Valley’s Overstuffed Unicorns appeared first on rule 11 reader.

Risk Management in Submarine Cable Systems

Risk Management in Submarine Cable System   Submarine networks carry over 99% of the world’s Intercontinental electronic communications traffic. There is misconception that Satellites carry data from continent to continent. If we ask anyone in the world, 95% of people give answer as satellites carry international traffic. This is absolutely wrong.   The Internet, International […]

The post Risk Management in Submarine Cable Systems appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Best Practices for RHV 4

Hi folks, one of the many things that I’ve been working on behind the scenes has finally seen the light of day: Best Practices for Red Hat Virtualization 4. This takes over where the product documentation leaves off.What I mean by that is this:

The product documentation is (mostly) great about telling you “how” to do the many activities related to deploying Red Hat Virtualization.

This new document tells you “why” to do many of the activities related to deploying Red Hat Virtualization. It does NOT have code examples, but it DOES have lots of things to consider. Things like:

  • “Standard” deployment or “Hosted Engine” deployment
  • RHEL host or RHV host
  • NAS or SAN
  • Lager or Ale (just kidding)

In other words, when you go to plan out your deployment, this is the document that you want to read before you paint yourself into a corner. Many of the items are best practices, like “don’t turn off SELinux”. Others are more considerations and implications, like “NAS or SAN”.

If this is something you’re interested in, you can download it here:

Best Practices for Red Hat Virtualization 4

Hope this helps,

Captain KVM

 

The post Best Practices for RHV Continue reading

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