ARUBA 9000 SERIES GATEWAYS

Aruba 9000 Series Gateways provide high-performance

networking, SD-WAN and security functionality in compact

and cost-effective form factors. Ideally suited for branch and

small campus networks, the 9000 Series Gateways serve a

key role within Aruba’s SD-Branch solution, which unifies

WLAN, LAN, SD-WAN and security for distributed enterprises.

The 9000 Series can be easily configured and managed using

Aruba Central, a cloud-based network operations, assurance

and security platform. Onsite deployment is accomplished

with a simple mobile installer application.

HIGH PERFORMANCE AND RELIABILITY

For distributed enterprises with increasing performance and

bandwidth needs, the 9000 Series is designed with scale

and flexibility, and equipped with plenty of horsepower at a

competitive price-point.

The 9000 Series provides connectivity for up to 2,048 users

or client devices at up to 6 Gbps of firewall throughput. These

capabilities are up to 80 times the client density and 10 times

the maximum throughput of typical SD-WAN appliances.

For enhanced resiliency and high availability, the multiple

9000 Series can be clustered together at each branch.

IOT AND INTEGRATION READY

The 9000 Series includes flexible connectivity options:

• 4xGbE – 9004

• 12xGbE (6xPoE+) – 9012

• USB 3.0 ports

• IoT Radio that supports BLE technologies

• Integrated LTE connectivity – 9004-LTE

The gateway also uses integrated device profiling to

improve client visibility, and works with Aruba Central,

ClearPass Policy Manager or ClearPass Device Insight to

provide advanced user, device and IoT policy management

and insights.

ARUBA 9000 SERIES GATEWAYS: ACDX

Versatile, cost-effective branch networking, SD‑WAN, and security

SD-WAN DEPLOYMENT

For organizations that are now managing multiple WAN

connections, 9000 Series Gateways can be connected to

Aruba’s SD-WAN fabric right out of the box. SD-WAN is a

rich WAN management solution that is used to simplify

management of traffic entering and exiting branch

sites. Role-based intrusion detection and prevention

(IDS/IPS), Dynamic Segmentation, and stateful firewall

deliver integrated security requirements. Please refer to the

SD-WAN datasheet for more information.

BRANCH AND CAMPUS DEPLOYMENT

9000 Series Gateways can also be re-purposed as Mobility

Controllers to provide WLAN and LAN services such as

Dynamic Segmentation, stateful firewall and Live Upgrades.

In this mode, the 9000 Series cannot simultaneously be

used for SD-WAN. For more information, refer to the

ArubaOS datasheet.

Google Dark Fiber Plans Long-Term Trends, Hires Fiber Optic Lines from Other Networks

Google could expand its fiber offerings around the United States, after announcing that it will bring online various "dark fiber" networks that have remained dormant for too long. Although it will be limited to certain areas of certain cities, Google will soon make it much easier for people to access ultra-fast internet connections ready fiber.

The dark fibers are not quite similar to those of the dark blanket, so don't imagine an underground network of millions of spaghetti fiber optic cables, all wrapped together like a king tech rat. The dark fiber is more like the child forgotten by the high-speed era. It is a cable that was laid by companies in the hope that someone will pay them to use it in the future.

How much there is an unused fiber optic cable depends a lot on the state and city authorities, because some have seen the fibers much more important for the future of their premises than others. San Francisco is a city with a lot of unused cables, so all Google has to do is install connections from local hubs to individual buildings and it's off and running.

Other cities that expect to benefit from the use of existing, unused infrastructure include Salt Lake City, San Atonio, Nashville, Huntsville and Charlotte, among others.

Unfortunately, to save costs, Google only plans to wire buildings where multiple companies or families can purchase fiber connections. But if all goes well, it won't be long before the same package is offered to individual homes.

One of the most interesting aspects of this ad, as the motherboard pointed out, is that Google is using someone else's network. Existing US telecommunications companies do not do this often because they would prefer to control the entire connection, but Google is happy to break with tradition to increase the availability of fiber it seems.

This practice is much more common in other countries. In the United Kingdom, British Telecom (BT) and TalkTalk regularly lease the use of their lines to competing ISPs, and indeed, until recently, BT was the sole line operator throughout the country.

It will be interesting to see if Google sets a precedent and we will see more companies that will fall on this path in the future.

THE F5 CODE: WE EMPOWER YOU TO DO GREAT THINGS

Code is at the heart of our DNA; it’s what makes us human. And it’s at the core of our company DNA: it informs our code of ethics, guides how we work together and help our communities thrive, and drives how our product development teams innovate.

Code also brings applications to life—applications that change the world. You use these apps every day—and not just on your smartphone. Imagine life without online shopping, cloud storage, or other web-based services that we currently take for granted. F5 creates products and services that the world’s leading retailers, banks, securities firms, telecom operators, insurance companies, automotive manufacturers, and 48 of the Fortune 50 rely on to deliver their services faster and with the highest levels of flexibility, security, performance, and support.

This is a once-in-a-lifetime opportunity to become part of a company that’s on the leading edge of transformation. We believe code—our human code and our digital code—opens doors. And because we know that a more diverse F5 is a more powerful F5, we’re looking for smart, talented, determined individuals to join us. If you make thoughtful decisions quickly, obsess over your customers’ needs, take ownership of your work (the mistakes as well as the successes), and embrace different perspectives by putting the human first, then we want to talk to you.

Our Culture Supports Your Whole Life

Our success isn’t driven solely by what we do. We also care deeply about how we do it. At F5, our culture is how we live, every single day. And it’s producing extraordinary results—not only for our customers, but also for our employees. We understand that your life is about more than just work, so we’re committed to a culture that supports your whole life. We offer work/life integration programs like Freedom to Flex, dynamic employee inclusion groups, paid maternity/paternity leave, tuition assistance for professional development, a comprehensive mentoring program, rewards/recognition, and so much more. At F5, we truly do help each other thrive and it shows: F5 has been named one of the “World’s Most Admired Companies” by Fortune magazine for the past two years in a row.

F5 is committed to being a force for social good.

This commitment to living our culture doesn’t just exist within our offices; it extends into our communities as well. The F5 Global Good program, which includes grants from the F5 Foundation, expands the culture of “doing good” that F5ers have nurtured over the past two decades, allowing us to extend our reach in three focus areas: f5 networks careers

Community: Supporting charitable causes that our employees feel most passionately about, especially those in the communities where we live and work.

STEM education: Enabling girls, women, minorities, and other underrepresented groups to develop STEM skills by connecting them to global educational and employment opportunities.

Tech for Good: Assisting nonprofit organizations with their digital transformation efforts so they can do even more to help those they serve. 

WE’VE REDEFINED RESPONSIBILITY.

We Bring an Owner’s Mindset to Everything We Do, Every Day

Do you thrive in an environment where you’re empowered to make thoughtful decisions quickly? Where you’re encouraged to try new things, learn from your mistakes, iterate, and move forward? Where you’re expected to find ways to cut out unnecessary red tape? At every level of the organization, we trust you to efficiently seek out the guidance and feedback you need, and then to proceed with speed and intent to turn your ideas into reality.

OUR LEADERS DO THE RIGHT THING EVEN WHEN NOBODY IS LOOKING.

At F5, Anyone Can Be a Leader – Regardless of Title or Role

We believe leadership is a mindset, and that true leaders can be found anywhere across the company. Our leaders are passionately committed to embodying our BeF5 behaviors and embracing our LeadF5 principles, which includes empowering employees to do great things for our customers, uniting our diverse workgroups around shared goals, and continuously pursuing higher levels of performance.

System Administrator Linux SRE Engineer

We are looking for a Linux \ SRE Engineer with extensive experience who will be responsible for all the processes of maintaining the information system.  

What to do: sysadmin salary

Development of a monitoring system based on Prometheus (VictoriaMetrics) and long-term data storage; 

Providing developers with tools for debugging and monitoring - dashboards, logs, traces and alerts; 

Capacity planning and ensuring fault tolerance and high availability of these systems;  

Collecting metrics from all subsystems, writing metrics exporters for Prometheus. 

Current tasks (~ 6 months): 

Build dev / beta / prod outlines within unstructured information; 

Build fault-tolerant balancers with service discovery for non-Kubernetes infrastructure; 

Document the process of creating environments and examine the Ansible role suite; 

Automate routine operations and reduce the amount of sacred knowledge; 

Support existing IaaS private installations. 

What do we expect from a candidate?

Experience in administering a large number of servers, workflow automation, knowledge of Ansible; 

Experience in deploying the CI pipeline on Jenkins and / or GitLab CI; 

Building rpm packages and writing Makefile; 

Knowledge and experience with Kubernetes, Helm - understand how to build helm releases of a whole system. 

Will be a plus:

Experience with virtualization systems Proxmox, Opennebula, oVirt or similar; 

Experience in writing scripts and applications in Python, Bash; 

Understanding the concept of SDN. 

We offer:

Interesting tasks and the opportunity to join a team of professionals;

Official salary, registration according to the Labor Code of the Russian Federation;

VHI with VIP-class clinics, including for children under 18;

Power compensation;

Partial fitness compensation;

Modern technology for work;

Comfortable office;

Flexible work schedule with the ability to shift the start of the working day;

We are considering options with partially remote and remote employment;

Corporate transport from metro Altufevo and Rechnoy Vokzal;

Parking on the territory of the business center;

Relocation package for candidates;

Opportunities for professional growth and development.

Cisco CCNA, LAN to Wireless Switching

Do you want to work in a cozy office, or maybe even at home? Do all employers require work experience? Do you know who could help you?

Cisco courses are a good chance to prove yourself to future employers.

We have already trained 2,000 IT specialists, 100% of our graduates are employed, 95% of graduates receive international certificates.

If you were expecting a "sign from above", so here it is. Everything depends only on you, we believe in you! For our part, we promise a high level of teaching.

The groups are almost complete, so don't miss this chance! We look forward to seeing you!

Graduation Document: Cisco CCNA Industry Certification.

Program: ccna wireless

This course provides a comprehensive, theoretical and practical approach to learning the technologies and protocols required to design and implement a converged switched network. Students will learn about the hierarchical network design model and how to select devices for each level. The course explains how to configure a switch for basic functionality and how to implement VLAN, VTP, and cross-species routing in a converged network. Various implementations of the Spanning Tree protocol in a converged network are presented, and students develop the knowledge and skills necessary to implement WWLAN in small to medium-sized networks.

Chapter 1. LAN Design

Switched LAN architecture.

Coordination of switches with specific functions of the local network.

Chapter 2. Configuring the Switch

Introduction to local area networks Ethernet / 802.3.

Forwarding Ethernet frames using a switch.

Switch management configuration.

Configuring switch security.

Chapter 3. VLANs

Familiarity with VLAN concepts.

VLAN trunking.

VLAN configuration.

Troubleshooting VLAN

Chapter 4. VTP Implementation

Familiarity with VTP concepts.

VTP operation.

Configuring VTP.

Chapter 5. Implementing Spanning Tree Protocols

Layer 2 redundant topologies.

Configuring VLAN-based Spanning Tree Protocol.

Configuring VLAN-based Fast Spanning Tree Protocol.

Chapter 6. Implementing Inter-VLAN Routing

Inter-VLAN routing view.

Configuring inter-VLAN routing.

Troubleshooting.

Chapter 7. Configuring Your Wireless Router

Wireless LAN topology.

Wireless LAN Security.

Setting up a wireless access point.

Troubleshoot wireless clients.

Optical Circuits of Fiber-optic Devices

Fiber optics is a branch of optics that studies the physical phenomena that arise and flow in optical fibers, as well as products of the precision engineering industries, which include components based on optical fibers how fiber optics work.

Fiber optic devices include: lasers, amplifiers, multiplexers, demultiplexers, and others. Fiber optic components include: insulators, mirrors, connectors, splitters, and others. The basis of a fiber-optic device is its optical design - a set of fiber-optic components connected in a specific sequence. Optical circuits can be closed or open, with or without feedback.

Optical circuits of fiber-optic devices:

Laser

The figure shows the simplest diagram of a fiber-optic laser, where A is an active fiber, D is a pump diode, and M1 and M2 are mirrors. As in the case of conventional lasers, there is a cavity with an active medium formed by an active fiber and mirrors. Mirrors provide feedback. One of the mirrors can be 100% reflective. Then the radiation will come out only from the opposite end of the resonator. There can be several pump diodes, and they can be located on different sides of the resonator.

Amplifier

The figure shows the simplest diagram of a fiber optic amplifier. It is similar to that of a laser except that the mirrors are replaced with insulators to suppress feedback. Insulators only allow light to pass in one direction.

Fiber Optic Component Arrangement:

Mirrors and filters

A mirror is a component that reflects radiation of a certain frequency with a certain reflection coefficient. The filter, in turn, transmits radiation of a certain frequency, usually in a narrow frequency range, and absorbs or scatters the rest of the radiation. For the manufacture of mirrors and filters, diffraction gratings are used, deposited on a section of the fiber core. The analogue of the stroke is performed by ultraviolet illumination, which changes the properties of the fiber at the place of irradiation. One and the same diffraction grating for different signal frequencies will be either a mirror or a filter.

Insulators

Insulators allow radiation to pass in only one direction. In electricity, their analogue is diodes. Optical isolators operate on the Faraday effect and are not fully fiber optic. The working area of ​​the insulator consists of two polarizers and a Faraday cell (a magnet with a special crystal embedded in it). In the cavity of the magnet, and therefore in the crystal, a magnetic field is created, which rotates the polarization of the transmitted radiation by 45 degrees. The axes of the polarizers are also rotated at an angle of 45 degrees relative to each other. Due to this, radiation in one direction passes unhindered (and at the same time becomes linearly polarized), and does not pass in the other direction, because delayed by the output polarizer. The input and output of the insulator are made in the form of sections of optical fiber, so that this component can be used in optical circuits. To improve the characteristics of the insulator, lenses are placed after exiting the fiber and before entering another fiber, which make the beam parallel, which significantly reduces losses.

Connectors & Splitters

They are two parallel fibers, devoid of a shell and in contact with each other. Fiber contact and fixation is achieved at high temperatures - above the fiber melting point. Thus, the fiber sections are fused together. Depending on the length of the common section, as a result of wave interference, an arbitrary division ratio of the output signal can be obtained over the two output fibers.

Active fiber

A fiber capable of amplifying or generating a signal of a specific frequency. This is achieved by introducing rare-earth impurities into the silica fiber, depending on the required amplification frequency. Thus, ytterbium (Yb) impurities give amplification at wavelengths of 1.06 and 1.3 µm, and erbium (Er) impurities at a wavelength of 1.5 µm. The gain peak is determined by the transparency peak of a particular impurity.

Passive fiber

Non-reinforcing fiber. It is used to connect fiber-optic components to each other, as well as to increase the total length of the optical circuit, if necessary.

Pump diodes

As in the case of conventional lasers, pumping of the active medium is required to start amplification and generation. Semiconductor laser diodes are used to pump active fibers. At the exit from the semiconductor crystal, the laser beam is collimated and introduced into the fiber. The choice of the wavelength of the pump diodes is due to the absorption peaks of active fibers, which fall in narrow ranges in the regions of 0.81 mm, 0.98 mm, and 1.48 mm. For ytterbium fibers, pumping is most efficient in the range 0.95-0.98 mm. By looking at the ratio of pump and signal wavelengths, one can determine the maximum possible efficiency of lasers and amplifiers. For ytterbium fibers, it will be 0.95: 1.06 = 90%. In practice, the efficiency is of course lower.

Non-linear effects in optical fibers

2nd harmonic generation

With sufficient radiation power in the optical fiber, the radiation frequency is doubled. For example, in ytterbium fibers operating at a wavelength of 1.06 μm, the second harmonic generation leads to the appearance of radiation with a wavelength of 0.53 μm. This radiation is in the visible range and is an emerald green light.

Fiber Optic Applications

Optical fibers can be used for medical purposes, for example, inserting a camera into a patient's body to transmit an image of an organ or lesion to an external television camera, which eliminates the need for examination using surgery. In automobiles, they are used to supply light from a common source to various dashboards. Optical fibers link computers, robots, television sets, and telephones in many factories and offices.

 

Transforming Day 2 Operations with Cisco Data Center Network Assurance and Insights

The challenge of operating a data center has never been greater. But the opportunities have never been larger. Today, data-driven businesses (which is to say, most businesses) are changing rapidly to stay competitive. There are more applications than ever, and more different classes of people and machines using the applications. And there’s constant change in the shape of business infrastructures, as data “centers” become less centralized thanks to edge and cloud-based storage and compute resources.

The opportunity for us in IT is to enable these changes. When we do this well, IT is in strategic partnership with business. Being flexible and responsive to business means that strategic planners will find encouragement for their plans in the technology core where we work, which makes IT leaders copilots in business growth ccie data center salary.

But the only way for IT to offer this level of service is to have deep understanding of what the data center is doing, how everyone and everything is using it, how it is responding to the demands on it, and most importantly, how it will respond to new loads that arise due to new business processes.

Intent-based networking helps network operators get ahead, instead of playing catch-up.

Most of these capabilities are part of running a network, what is now often called Day 2 Operations. (For the record, Day 0 is design and procurement; Day 1 is installing, provisioning, segmenting – getting it running.)

To make Day 2 Ops easier for our customers, we’re happy to announce today that Cisco is expanding its Data Center Network Assurance and Insights suite to include new Network Insights capabilities. This portfolio of software analytics capabilities for existing Cisco data center installations — whether they’re based on DCNM or ACI – can analyze every component of a data center to first, assure business intent; second, guarantee reliability; and finally, identify performance issues in a network before they happen.

These new capabilities enable people in IT operations to do their jobs more easily, and in the process, add value to the data center and the business itself. It is part of our drive to bring intent-based networking to our customers, so they can spend more time thinking about what they want their installations to do, and less time worrying about how they will do it.

The Latest Tools

To keep a network running smoothly, we are adding service reliability functions to Network Insights. New features  will gather system-level wide data from every Cisco switch in the fabric, detect anomalies before they impact applications, and notify operators of these issues before they affect the integrity of  network services. Network Insights can also provide proactive upgrade advice for devices across the fabric.

If a problem should arise, our intelligent analytics capability will identify the root cause, using real-time flow telemetry from devices in the fabric. This feature monitors application patterns, latency data, packet drops, and other metrics to allow for fast correlation between infrastructure status and actual network traffic.

We are adding more assurance capabilities as well. The new change verification feature allows operators to understand the impacts of changes by modeling them before they are implemented in the fabric.

With all these new capabilities, we will provide a common solution, one that works across ACI and NX-OS, as we  transform Day 2 Operations from reactive to proactive.