There are some problems a digital transformation can't fix.
This is the second from the series of the articles that discuss a complete configuration of the enterprise network. Our enterprise campus network consists of the core, distribution and access layer. This network infrastructure design is called a three-tier network model. Each layer has specific function. The access layer provides access for end users to the network . They are two access switches located inside the access layer. The access switches OpenSwitch-Acc-I and OpenSwitch-Acc-II are OpenSwitch Qemu appliances installed on VMware VMDK disks. The switches run OpenSwitch network OS version 0.4.0 and they have assigned 1024 MB memory by GNS3. More details about building OpenSwitch appliance prior to version 2.0 can be found here.
The ports Ethernet 3 a and 4 on both switches are configured as access ports and they connect PC1 and PC4 to the campus network. The ports Ethernet 1 and Ethernet 2 are uplinks that connect access switches to the distribution switches. They are configured as trunk ports, carrying traffic from multiple VLANs. Thanks to redundant uplink connection, the access switches remain connected to the upper layer, even in case of the failure one of the distribution switches.
Picture 1 - Access Switches Connected Continue reading
What is last mile and first mile ? This is an important telecommunication term which is used in all broadband communication methods. In this post, I will explain the term, differences and some detail about this term. In fact, last mile and the first mile is the same thing. The link between the […]
The post What is last mile and first mile ? appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.
Here’s the list of webinars and events planned for October and November 2017:
Hint: you get access to all live webinar sessions, and 170 hours of downloadable videos with ipSpace.net subscription.
Best Practices Ruby Style Guide Rails Testing Best Practices Comment Variable String Stings are mutable in Ruby HERE Doc HERE are used for multi-line strings Symbol Symbols are similar to strings except they are immutable Integer Boolean Array Hash # New syntax - Ruby >= 1.9 For Loop #...continue reading
Best Practices Python Style Guide Comment Doc String Variable String Integer Boolean List Tuple Dictionary For Loop While Loop If, Elif, Else Function Class Using Modules continue reading
Fig 1.1- Cisco Continue reading |
At Cloudflare we're extensively using the Go programming language to build a better Internet. Go is a free and open source programming language created by Google in 2007 and open sourced in 2009. Earlier this year, Go made news when it entered the list of top 10 programming languages on the TIOBE Index.
Recently we launched an internal monthly Go Hack Night at our San Francisco office, open to anyone who works at Cloudflare regardless of their department or position. Anyone from newbie programmers to our most experienced Go engineers are encouraged to attend, and experienced engineers are asked to throw on a mentor badge and help guide colleagues with installing and learning Go.
We had over 30 attendees at our inaugural Go Hack Night, and our survey reveals some great stats:
We actively encourage an inclusive learning culture and we're super excited to make the Go programming language more accessible to our entire company.
If you're interested in working with Go and helping to build a better Internet, we're hiring!
P.S. if Continue reading
Fig 1.1- Basic POE Switch connected with IP Cameras |
Fig 1.2- POE switch with IP-Phones |
October is European Cybersecurity Month, an annual advocacy campaign to raise awareness of cyber risks among citizens and businesses, and to share best practices in cybersecurity. This year’s campaign was launched at an event in Estonia, a country which both holds the current Presidency seat of the European Council and is well known as being highly cyber aware and digitally savvy.
It is fitting, therefore, that it is under Estonia’s Presidency that the European Commission announced a number of initiatives last month aimed at stepping up the European Union’s cybersecurity capacity and response to cyber attacks, while laying the foundations for increased cyber awareness and better cyber hygiene overall.
This EU’s Cybersecurity Strategy is a welcome initiative, as we already know that the overall cyber threat level is rising. At Cloudflare, we deal with a new type of DDoS attack every 3 minutes, and it has been that way for the last 6 months. This year alone, we've seen a DDoS attack that peaked at 300 Mpps and another at 480 Gbps. Furthermore, as DDoS mitigation companies like Cloudflare have become adept at handling 'traditional' DDoS attacks, the attackers have also adapted and increasingly try out new techniques.
Here’s a catalog of all the media I produced (or helped produce) in September 2017.
I closed down the Hot Aisle newsletter after months of struggling to know what to do with it. Originally, the Hot Aisle was a way for me to express my individual voice about networking, design, emerging trends, and the IT industry without necessarily having that opinion attached to Packet Pushers, my company. It was also an unsponsored newsletter, which I felt was a nice thing to be able to Continue reading
Here’s a catalog of all the media I produced (or helped produce) in September 2017.
I closed down the Hot Aisle newsletter after months of struggling to know what to do with it. Originally, the Hot Aisle was a way for me to express my individual voice about networking, design, emerging trends, and the IT industry without necessarily having that opinion attached to Packet Pushers, my company. It was also an unsponsored newsletter, which I felt was a nice thing to be able to Continue reading
In just over two months it will be time for the Juniper customer summit known as NXTWORK 2017. This is an …
The post Juniper NXTWORK 2017 appeared first on Fryguy's Blog.
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.
Because of this, I believe it’s perceived Arista has a better programmability strategy than other vendors. From what I can tell, it is not the case. However, given a few features Arista has in EOS, it makes programming EOS a bit easier than other platforms. Let’s take a look.
At Network Field Day 16, Arista reviewed their programmability strategy. There were 5 core components reviewed:
Before diving into each of these, I’ll first point out that when I look at “OS programmability,” what is important [to me] is device-level programmability (not controllers or streaming capabilities–those are important topics, but should be covered on their own). Programmability is the ability to program change on a device, isn’t it? Now let’s look at the 5 components in Arista’s strategy.
EAPI - it’s a great API for learning to program an EOS switch. This Continue reading
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.
Because of this, I believe it’s perceived Arista has a better programmability strategy than other vendors. From what I can tell, it is not the case. However, given a few features Arista has in EOS, it makes programming EOS a bit easier than other platforms. Let’s take a look.
At Network Field Day 16, Arista reviewed their programmability strategy. There were 5 core components reviewed:
Before diving into each of these, I’ll first point out that when I look at “OS programmability,” what is important [to me] is device-level programmability (not controllers or streaming capabilities–those are important topics, but should be covered on their own). Programmability is the ability to program change on a device, isn’t it? Now let’s look at the 5 components in Arista’s strategy.
EAPI - it’s a great API for learning to program an EOS switch. This Continue reading