D/Line Radio Blog

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LLDP, Voice and Port Security on Comware 7

Getting a practical deployment of 802.1x on the wired network running Comware 7 is something that’s been on my radar for a while now. Until recently, we had a working (for our system) configuration...

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Plotting for Improvement

It’s something a lot of community radio stations here in the UK are trying to improve – their FM coverage footprint. While the 25 watts ERP that Ofcom often licence stations at is usually...

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I’ll Take the High Road…

When does a URL not take you where you expect? Usually only when something’s wrong. However, I recently encountered a URL that would result in a browser taking a rather long path to the...

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Virtualizing the Campus Network

I’ll be the first to admit that I never really intended to be talking about in-depth networking topics when I started this blog a few years back. However, that’s been where a lot of...

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Some Experiments in OpenStack

As a little side project, I’ve been toying with OpenStack to replace ESXi on a couple of old servers I’ve got in a lab. Now that it’s up and running, I must say I’m...

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A Matter of Wireless Trust

For various very good reasons, we’ve recently had to change the the certificate presented by our RADIUS server for the wireless networks. The process of accepting the new certificate was a breeze on the...

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Audio Processing in Interpreted Languages

It’s no surprise that today’s computer programs are getting bigger and more complex. CPU and memory are now in available in a way they never were before. A quick glance at the Raspberry Pi...

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Comware IRFs – A Few Lessons

Look in almost any organisation that’s been running for more than a few years and you’ll see legacy IT kit still keeping business critical services alive. There are places where IPX is still a...

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Network Switch APIs (and the Lack Thereof)

Since the dawn of time on managed network switches, we’ve had the CLI. Well, that’s a bit of a lie – menu driven interfaces were the go-to option for a number of years. But...