• Telecommunications Consulting

    Telecommunications Consulting

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

    Internetworking Training Experts

    Click on Training and then Courses. Read More
  • Wireshark Experts

    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?

    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

    Online Certification Training

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

    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

    Enabling the IoT with Wireless

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

    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'sNetworking 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.

Our Latest Content

  • IPv4/IPv6 Path MTU Discovery Demystified

    A major change in the behavior of IP networks between IPv4 and IPv6 is that in IPv6 networks, all hosts

    Read More
  • Creating Delay to a Subnet Tech Tip

    I received a question on how to create a delay to a subnet using GNS3. Below is my answer:

    Read More
  • GNS3 in Linux - Tech Tip - Docker Error

    I recently watched a YouTube video where one of the GNS3 creators was talking about GNS3 and how it runs. 

    Read More
  • The Linux 'ip' Command in Networking

    One way to examine your network configuration in Linux is to use the "ip" command.  I have attached a cheat

    Read More
  • Detecting ECMP in Linux using Paris and Dublin Traceroute

    Traceroute Comparison Capture pcapng for Wireshark Equal-Cost Multi-Path (ECMP) is a forwarding mechanism for routing packets along multiple paths of

    Read More
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Our Most Popular Articles

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

    Let's answer the question.  If you want more details than what we have provided below, check out our chapter on

    Read More
  • Neighbor Discovery (ND) Table in IPv6 Windows, Linux and MAC Machines

    A great question I was asked in class was: "If Neighbor Discovery processes have replaced ARP in ICMPv6, how do

    Read More
  • IPv6 Windows Command Line Examples

    Here are some great Windows command line entries you can make to examine and configure IPv6 (assuming your version of

    Read More
  • How do I reset my "Default" profile in Wireshark?

    This is a commonly asked question that usually results from users learning the can have different profiles after they have

    Read More
  • A List of Network Monitoring Tools for Network and System Administrators

    Monitoring, analyzing, managing, and diagraming a network can often be a huge problem for Network and System Administrators.  They are

    Read More
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