Tag: Networking
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Inside the HPE Aruba Networking CX 9300S: A 16 Tbps Switch With the Lid Off
At HPE Discover 2026, HPE had a CX 9300S opened up on the stand with its lid off, which is a rare look inside a shipping-class data-center switch. It is a 16 Tbps, 1U box with 32 ports of 100GbE and 8 of 400GbE, and on the inside it is mostly one giant switching ASIC…
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Intel E835 Up Close: 200GbE, 25GbE, and One Card That Reconfigures Its Ports
At HPE Discover 2026, Intel’s new E835 lineup is two ends of the same idea: the E835-CQDA2, a 200GbE card that can run as one 200G link, two 100G links, or break out to 25 and 50G, and the E835-XXVDA2, a plain dual-port 25GbE card that costs a fraction as much. Neither is an AI-fabric…
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A 4-Port 25GbE NIC in an 800G World: The Intel E830-XXVDA4F Up Close
At HPE Discover 2026, surrounded by 800G AI fabrics, the Intel Ethernet Network Adapter E830-XXVDA4F is the card most servers will actually ship with: four 25GbE SFP28 ports on Intel’s E830 controller, with the kind of precision timing and security features that matter more in the real world than another zero on the port speed.…
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36 Power Supplies for One Router: The HPE Juniper PTX12012 Up Close
At HPE Discover 2026, the HPE Juniper PTX12012 is the router that makes you look at the power and cooling first. It is a 12-slot, 32U core router that scales to 518.4 terabits and 648 ports of 800G, fed by a back wall of up to 36 power supply modules. I found the PTX12012 staged…
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204.8T of Switching Capacity Per Tray in the AMD Helios AI Rack
At HPE Discover 2026, the most interesting thing I found on the networking side was not a GPU. It was the tray feeding them: the HPE Juniper QFX5252, a scale-up switch carrying 204.8 terabits of capacity in a single liquid-cooled module for the AMD Helios AI rack. Walking the floor on June 18 in Las…
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How to Determine the Cause of a Disconnected UniFi Device
When a UniFi device shows as disconnected or offline in the UniFi Network application, it doesn’t always mean the users connected to that device are experiencing internet issues. Understanding the root cause is key to fixing the problem and preventing future outages. Does “Disconnected” Mean the Internet is Down? Not always. A disconnected device simply…
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UniFi SSH Commands Guide
Troubleshooting, adoption, and maintenance via command line Accessing UniFi devices via SSH is one of the most powerful ways to troubleshoot issues, inspect device settings, adopt devices manually, or perform advanced configuration and reset tasks. This guide walks you through how to SSH into a UniFi device and lists the most useful SSH commands with…
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UniFi Isolated: What It Means and How to Fix It
When managing a UniFi network, you may notice a device listed as “Isolated.” This status can be confusing, especially if the device seems to be working. In this guide, we’ll explain what “Isolated” means in UniFi, why it happens, and how to fix it for both wired and wireless (mesh) access points. What Does “Isolated”…
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UniFi Devices: Which Support Active PoE and Passive PoE?
A complete and current overview of which UniFi devices support various PoE types, including 802.3af, 802.3at, 802.3bt, and 24V Passive PoE. Understanding PoE UniFi devices use various PoE types: ⚠️ 24V passive PoE is not interchangeable with 802.3af/at/bt. Powering devices with incompatible voltage can permanently damage them. UniFi Access Points Legacy 24V Passive PoE APs…
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Troubleshooting Wi-Fi Connection Issues: A Comprehensive Guide
In today’s world, a stable and reliable Wi-Fi connection is essential for work, entertainment, and communication. However, there are times when you might find yourself unable to connect to Wi-Fi, which can be frustrating and disruptive. This guide provides a comprehensive approach to troubleshooting common Wi-Fi connection issues, helping you identify and resolve the problem…
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