I’m Robin Christ, Freelance Consultant, professional impulse buyer and ADHD-and-energy-drink-induced-hyperfocus-enjoyer. Here, I share sporadic posts on networking crimes, C++, hardware, events, and whatever else catches my curiosity.
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Introduction Cumulus Linux and the included Mellanox Hardware Management package (hw-mgmt) heavily rely on information from the BIOS DMI / SMBIOS to determine the system type / hardware configuration. If this information is wrong (or rather: incompatible), you can have all kinds of funny issues, like the fans constantly running at full speed because the ASIC temperature sensor is not initialized correctly, or the thermal control loop using wrong thresholds or PWM addresses… ...
Some OEM FRUs (fans or PSUs) for Mellanox switches may cause issues under Cumulus Linux due to OEM PNs in the EEPROMs. This guide explains how to modify the EEPROMs to resolve these issues.
A collection of tips and tricks for Cumulus Linux
The state of temporary Audio over IP Networks is poor, with large, brittle stretched VLANs and redundancy provided by Spanning Tree Protocol. This article provides an introduction to Layer 3, Routing Protocols and design principles for Layer 3 fabrics
The state of temporary Audio over IP Networks is poor, with large, brittle stretched VLANs and redundancy provided by Spanning Tree Protocol. This article covers the basic design goals for such networks and establishes why L2 should be considered harmful.
Arista 7050X series switches have some undocumented commands, which allow you to unlock “more” bandwidth for recirculation without disabling physical ports. Read about how and why.