CellStream Services!

Telecommunications Consulting

Consulting Services from Network Design to Project Management Read More
Internetworking Training Experts

Click on Training and then Courses. Read More
Wireshark Experts

Packet analysis expertise is critical in today's networks, and being able to use the best packet analyzer application is a skill we can help you and your team attain. Read More
Are you a Network Scientist?

Online Learning, Instructor Led in person or Web-based delivery. Check out our online school. Read More
Online Certification Training

Find out about our Network Self Certification Program for Rural Service Providers here! Read More
IPv6 Experts

Along with other Internet regions, ARIN is out of IPv4 Addresses. Are you IPv6 fluent? Are you IPv6 ready? Read More
Enabling the IoT with Wireless

Without wireless, we cannot have the Internet of Things. Read More
MPLS Book for iPad and iPhone

Get Mr. Walding's book here! Read More

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Welcome to CellStream, Inc. - Telecom Consulting and Training!

Welcome to our home on the Internet, where we can not only share information, but also interact with each other. If you are a visitor to the site, there are a number of things to view: our FAQ's, Networking and Computing Tips, our CellStream Blog, and other fun reading can all be found in the drop down menus above. The Training menu provides access to our courses, our course calendar, and learning services. The Consulting Menu provides information on our consulting services and a place to meet our consulting and teaching team. Registered CellStream folks and our clients will log in using their private credentials to access projects, calendars and discussions.

Thanks for visiting! We always welcome comments and suggestions. You can also join our Slack channel here!

Are you paying more than $1,000 for multiday, hands on Training?

Then you are paying too much! At CellStream, we offer multi-day hands-on lab classes using your computer/laptop and our state of the art multi-router and/or multi-switch lab systems: We can...

Telephone Association Memberships

We are proud to be members and or work closely with the following Telephone Associations: Telephone Association of New...

Follow Us on Twitter!

Wi-Fi and WLAN Skills that save $$$

More than 60% of all truck rolls for Service Providers are related to Wi-Fi and Wireless LAN issues. From performance to interference, issues abound. We offer the industry best, hands on...

High Cost of IPv6 Training!

According to the NRO (Number Resource Organization) poll of over 1,500 ISPs in 140 countries, 45% reported struggling to find IPv6 knowledgeable staff, and over 50% said the costs were too...

Our Latest Content

Troubleshooting Your Network Using Port Mirroring and Packet Capture

Scenario Let's say you have a DHCP server running on a Cisco Switch that is behaving strangely and you want…
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Troubleshooting The Internet Using Ping (a.k.a. ICMP)

In this article, I wanted to provide a guide to using ping - ICMP Echo - to troubleshoot your network. Most people…
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BGP Autonomous System (AS) Numbers

In a recent class I was asked for some details on BGP Autonomous System (AS or ASN) Numbers. I thought…
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Leveraging the Linux Logger

In this article I want to visit a "not used enough" Linux tool called logger. As with managing any system,…
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Linux Security Focused Commands We All Need to Use

Too many people shrug off Linux for fears of security with a free and open source operating system, even today. …
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Our Most Popular Articles

What is the 'arp' command, and how can I use it?

Let's answer the question, but before I do, you can watch my ARP lesson on Youtube here: https://youtu.be/aD_caJxD7nY and look at the…
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A Great Toolkit for Presenters - Zoomit!

ZoomIt is a utility for the public speaker in all of us. When presenting information, sometimes it is helpful to…
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3 Ways to put your Wi-Fi Interface in Monitor Mode in Linux

Check out these great references as well: Our Wireless custom profile for Wireshark Our Udemy course on Wireless Packet capture…
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Neighbor Discovery (ND) Table in IPv6 Windows, Linux and MAC Machines

Check out these additional IPv6 Resources: Our IPv6 overview course at Udemy Our IPv6 Custom Profiles for Wireshark Our IPv6…
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What is the 'cat' command, and how can I use it?

The 'cat' [short for “concatenate“] command is one of the most frequently used commands in Linux and other operating systems. The…
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