hardware:
The BMC of the Edgecore Wedge 100BF has a default password. You can change it with passwd(1), but after a reboot it returns to the default password because the root filesystem of the BMC runs in memory. This article describes how you can change the default passwords such that they survive a reboot or power cycle.
read more...Every couple of years I run across a presentation that impacts my way of thinking about (network) technology.
read more...For about half a century we have been living in a world where the speed of computers grew at an exponential rate. This is known as Moore's law, which is actually an observation of Gordon Moore that the number of transistors in an integrated circuit doubled approximately every two years. But today, that rate has almost levelled off. And Moore's law is not the only exponential that has come to its end. The same is true for Dennard scaling. In networking we are also hitting limits. We have reached the Shannon limit in optical communication. And in network ASIC design we reached the limit of serial bandwidth I/O. The next sections explore the current challenges and the final sections describe R&D that is exploring ways to overcome these challenges.
read more...I had a first look at the Open Optical Monitoring (OOM) project of the Open Compute Project. OOM is a kernel driver that accesses the I2C management interface of SFP and QSFP modules. It can retrieve inventory data like model, serial number, manufacturor, optical power levels, etc.
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