Views: 552Network Engineers and folks learning networking – my OSPF Lab series is now available – you will find them here. There are three Labs that include GNS3 topologies, and PCAPS to emulate and capture these awesome labs: We have also begun our BGP series as well with new labs coming each week. If you
OSPF Lab Series Now Available Read More »
Views: 549Those of us doing packet capture in the early days, knew what today we call Wireshark to be The Ethereal Network Analyzer – originally released in mid 1998. That was it’s original name. Ethereal was renamed to Wireshark in 2006 if I recall correctly. Here is what it looked like: This 1st screenshot was
The Ethereal Network Analyzer – Before Wireshark Read More »
Views: 622Open Shortest Path First, or OSPF, is a dynamic routing protocol used by routers to exchange information about available IPv4 and IPv6 networks. It is classified as a link-state Interior Gateway Protocol, meaning it is designed to operate within a single organization or autonomous system. OSPF allows routers to automatically learn the network topology,
OSPF Specifications – A Complete Library Read More »
Views: 2,923Hi everyone! As many of you who have attended my conference presentations and Wi-Fi classes know, I spend time talking about the correct way of troubleshooting Wi-Fi networks. **********JUST UPDATED************* Power cycling or rebooting is NOT a first step. Here’s why: lets say you are having issues of some kind (slow speed, connectivity issues,
Our Comprehensive Wi-Fi Troubleshooting Guide Read More »
Views: 682The phrase net neutrality is often summarized as the principle that all Internet traffic should be treated equally. That definition is appealing, but technically lacking and incomplete. Modern networks do not—and often should not—treat every packet identically. The subject itself is not new around here and you can view my other posts on the
Views: 969For decades, network automation meant converting a human-designed, generally manual, memorized or scripted procedure into a repeatable process. An engineer decided what should happen, defined the required steps, tested the process, and authorized the “automation” to execute those steps. The automation might provision a VLAN, update a routing policy, restart a failed service, backup
Views: 852TLS 1.3, QUIC, HTTP/3, encrypted DNS, and Encrypted Client Hello increasingly conceal application and transport information that network operators traditionally used for troubleshooting, security inspection, filtering, performance optimization, and policy enforcement. Here is a little reference chart: This produces two defensible but conflicting positions: For most of the Internet’s history, and certainly for my
End-to-End Encryption: A Privacy Victory or a Networking Blind Spot? Read More »
Views: 780MPTS stands for Multi-Program Transport Stream. It is a format defined within MPEG-2 Transport Stream (MPEG-TS) standards where multiple independent programs (channels) are multiplexed into a single transport stream. A simple definition would be one MPTS carries multiple programs with each program containing a complete service of video plus audio plus metadata. Think of
What is MPTS? Plus a hands-on Lab Read More »
Views: 1,527Wi-Fi 8 is the informal market name for IEEE 802.11bn, currently being developed as the next major Wi-Fi generation after Wi-Fi 7. Its technical theme is UHR — Ultra High Reliability. Unlike earlier Wi-Fi generations that mainly advertised higher peak speeds, Wi-Fi 8 is aimed at making Wi-Fi more consistent, predictable, and reliable in
It’s Early Days – but what is Wi-Fi 8? Read More »
Views: 1,505Sometimes you need more than another vendor presentation, another product data sheet, or another search through the Internet. You need someone who understands the technology, understands the operational environment, and can help you determine what is actually happening and what you should do next. That is where CellStream consulting comes in. Since 1998, CellStream
What consulting services does CellStream Provide? Read More »
Views: 7,743For many broadband folks, this is a question that you need to know the answer to. So let’s answer in a picture and with supporting data. Well, let’s just say this is as best as one can determine. Naturally there is an intellectual property barrier to what Starlink/SpaceX has and is developing. There are
What is the Starlink Operational Model? Read More »
Views: 865Practical ChatGPT Skills for Troubleshooting, Wi-Fi, Packet Analysis, Safety, Documentation, and Customer Communication 2-Day Instructor-Led Hands-On CourseClick Here to go to our Service Provider Courses. Course Description Artificial Intelligence is rapidly becoming another tool available to broadband technicians—but knowing how to use AI effectively, safely, and responsibly is a skill in itself. CSI-OL-009 is
CSI-OL-009 – Integrating AI Into the Broadband Technician Role Read More »
Views: 739Do not troubleshoot Wireshark captures by chasing random red and black packets. Start with triage, classify the traffic, branch into the correct protocol workflow, and then prove the finding with packet evidence. The following is a shortened version of our structured “Triage → Classify → Branch → Prove” Wireshark troubleshooting workflow built from your
Wireshark Troubleshooting Workflow Read More »
Views: 29,915Windows Firewall allows you to control the traffic entering and leaving your system through various rules. You can create and configure firewall rules to permit or block specific network activities. If you are looking for a more complete curated and advanced set of examples – join our Patreon community and check out the posting
Configuring Windows Firewall Rules using netsh Read More »
Views: 26,3682-Day Instructor-Led Hands-On Lab CourseAvailable through Web-Based Live Delivery or On-Site DeliveryMinimum 10 Students – Maximum 16 Students What Students are saying about this class: Course Description Voice over IP problems can involve signaling, media, network performance, configuration, interoperability, or some combination of all of them. Wireshark gives technicians and engineers the packet-level evidence
CSI-HO-020-D – Explore Packet Analysis with Wireshark – Voice Edition – 2 Day Read More »
