What is a non-blocking switch?
How does Internet work - We know what is networking
It is fairly common to hear about switch being non-blocking. It’s because almost all switches today are non-blocking. But what that means? When I asked people around me on what exactly non-blocking switch means, they were unable to get to the same conclusion. I was going through a lot of different internet places and vendor documents before I wrote this here, but, do not hesitate to add something in comments if you have different view on the subject. Line-rate switch means the same as if you would said wire-speed switch. It basically means that this switch has the forwarding capacity that supports concurrently
Citizens of Tech 001 – Knuckle Cracking Felt Animals
Citizens of Tech is an experimental podcast about technology and other things interesting to techies. We know there's other podcasts in this space, but it's something we really wanted to do, so we thought we'd give it a try.
Author information
The post Citizens of Tech 001 – Knuckle Cracking Felt Animals appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Citizens of Tech 001 – Knuckle Cracking Felt Animals
Citizens of Tech is an experimental podcast about technology and other things interesting to techies. We know there's other podcasts in this space, but it's something we really wanted to do, so we thought we'd give it a try.
The post Citizens of Tech 001 – Knuckle Cracking Felt Animals appeared first on Packet Pushers.
Quick tool: PingInfoView
Quick tool: PingInfoView PingInfoView is a small utility that allows you to easily ping multiple host names and IP addresses, and watch the result in one table. It automatically ping to all hosts every number of seconds that you specify,…New Magento WAF Rule – RCE Vulnerability Protection
Today the Magento Security Team created a new ModSecurity rule and added it to our WAF rules to mitigate an important RCE (remote code execution) vulnerability in the Magento web e-commerce platform. Any customer using the WAF needs to click the ON button next to the “CloudFlare Magento” Group in the WAF Settings to enable protection immediately.
Both Magento version 1.9.1.0 CE and 1.14.1.0 EE are compromised by this vulnerability. CloudFlare WAF protection can help mitigate vulnerabilities like this, but it is vital that Magento users patch Magento immediately. Select and download the patch for SUPEE-5344.
Jolata Brings Big Data Tactics to Network Monitoring
What would it take to watch every frickin' packet on the network?
Pop Quiz: Which of These Security Startups Missed RSA?
Winner gets a pair of SDxCentral socks. We're not kidding.
SDxCentral Weekly News Roundup — April 24, 2015
Miss anything this week? Don't worry -- the SDxCentral Weekly Roundup is here!
iPexpert’s Newest “CCIE Wall of Fame” Adaditions 4/24/2015
Please join us in congratulating the following iPexpert client’s who have passed their CCIE lab!
This Week’s CCIE Success Stories
- Akash Deep, CCIE #48145 (Data Center)
- Shraddha Bhaskar, CCIE #48147 (Data Center)
- Claryeliza Gonzalez, CCIE #21961 (Data Center)
We Want to Hear From You!
Have you passed your CCIE lab exam and used any of iPexpert’s self-study products, or attended a CCIE Bootcamp? If so, we’d like to add you to our CCIE Wall of Fame!
Kubernetes and OpenContrail
I’ve been working over the last couple of weeks in integrating OpenContrail as a networking implementation for Kubernetes and got to the point where i ‘ve a prototype working with a multi-tier application example.
Kubernetes provides 3 basic constructs used in deploying applications:
- Pod
- Replication Controller
- Service
A Pod is a container environment that can execute one or more applications; each Pod executes on a host as one (typically) or more Docker processes sharing the same environment (including networking). A Replication Controller (RC) is a collection of Pods with the same execution characteristics. RCs ensure that the specified number of replicas are executing for a given Pod template.
Services are collections of Pods that are consumable as a service. Through a single IP end point, typically load-balanced to multiple backends.
Kubernetes comes with several application deployment examples. For the purpose of prototyping, I decided to use the K8PetStore example. It creates a 4-tier example: load-generator, frontend, redis-master and redis-slave. Each of these tiers, except for the redis-master) can be deployed as multiple instances.
With OpenContrail, we decided to create a new daemon that listens to the kubernetes API using the kubernetes controller framework. This daemon creates virtual networks on demand, for each Continue reading
Apigee Rings in Its IPO
API management company Apigee went public at $17 per share this morning.
PlexxiPulse—Breaking Down the Distributed Network
Most networks today (including Plexxi solutions) are built as distributed networks. This type of infrastructure reduces complexity and significantly increases network capabilities. Our own Marten Terpstra took a deep dive into the future of distributed networks this week on the Plexxi blog. He identifies and breaks down the “central command” system of today’s distributed networks, and its impact on the functionality of network solutions as a whole. Give it a read before you head out for the weekend.
Below please find a few of our top picks for our favorite news articles of the week. Have a great weekend!
CIO: Declare Your Independence – Virtualize that Network!
By Paul Gillan
Although a relative newcomer to virtualization compared to its server and storage brethren, virtualized networks – and their companion, software-defined networking (SDN) technology – are a no-brainer for any company that’s virtualizing other parts of its IT infrastructure. Once you move platforms to an internal cloud, you’ll want the underlying transport layer to deliver the same flexibility as the virtual resource. Storage, servers, desktops and software all benefit from a more flexible network.
Re/code: The Third Phase of Big Data
By Sumit Sadana
Back in the pre-Internet era of the Continue reading
AT&T Personifies Slow Crawl to SDN Ubiquity
The Wall Street Journal reported in a “CIO Journal” blog post that AT&T intends to virtualize 75% of its network by 2020,Show 234 – Design & Build #1 – Network Mergers
This is the first in a series we’re calling “Design & Build,” where we talk through some common network challenges you might face in your network career. Today, we talk about corporate mergers, where the network you know and love needs to work with a network that you don’t.
Author information
The post Show 234 – Design & Build #1 – Network Mergers appeared first on Packet Pushers Podcast and was written by Ethan Banks.
ADN – Awk Defined Networking
Because I have yet to transition to a completely software-defined network in which everything configures itself (wink wink), I still have to do tasks like bulk VLAN changes.Thanks to a recent innovation called ADN, or "AWK Defined Networking", I can do this in a shorter time window that the average bathroom break. For example, I just had a request to change all ports on a large access switch stack that are currently in VLAN 76 to VLAN 64:
# ssh switch_name.foo.com 'show int status | i _76_' | grep Gi | awk '{print "int ",$1,"n","description PC/Phone","n","switchport access vlan 64"}'
Password: ***
int Gi1/0/25
description PC/Phone
switchport access vlan 64
int Gi1/0/26
description PC/Phone
switchport access vlan 64
[many more deleted]
Then I copied and pasted the results into config mode. Back to lounging on the beach.
Not even any Python skills required!
ADN – Awk Defined Networking
Because I have yet to transition to a completely software-defined network in which everything configures itself (wink wink), I still have to do tasks like bulk VLAN changes.Thanks to a recent innovation called ADN, or "AWK Defined Networking", I can do this in a shorter time window that the average bathroom break. For example, I just had a request to change all ports on a large access switch stack that are currently in VLAN 76 to VLAN 64:
# ssh switch_name.foo.com 'show int status | i _76_' | grep Gi | awk '{print "int ",$1,"n","description PC/Phone","n","switchport access vlan 64"}'
Password: ***
int Gi1/0/25
description PC/Phone
switchport access vlan 64
int Gi1/0/26
description PC/Phone
switchport access vlan 64
[many more deleted]
Then I copied and pasted the results into config mode. Back to lounging on the beach.
Not even any Python skills required!