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HP Network Simulator – VirtualBox Version Issue

HP has released an updated Network Simulator. This uses VirtualBox to provide a hypervisor, as opposed to QEMU in earlier versions. When I tried it previously, it was unusably slow. This was in part due to my using nested virtualisation. The new version runs much better with nested virtualisation, although it’s still not fantastic – […]

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Network Gear Pricing – Software vs Hardware

Network equipment pricing has traditionally been based around hardware, even though most of the cost comes from the software. Trends such as bare-metal switching will clarify this cost/price relationship. But are we already seeing software showing up as a clear component of the prices of network gear? Pricing vs Costs: Hidden Software Charges The always excellent @mbushong recently […]

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Using OmniFocus for CCDE Study

A reader asked how I use OmniFocus to help with studying for certification exams. Here’s how I’m using OmniFocus to help with CCDE study. This may not be the ‘best’ way, but it’s what I use. Figure out your tasks Create a new Project in OmniFocus. Go through your usual sources of information for certification study […]

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Network Field Day 8 – I’m Going!

I am lucky enough to be invited to attend Network Field Day 8 this September, in Silicon Valley. For 3 days, I get to hang out with some of the smartest people in this industry, talking about the latest products and developments in networking. How cool is that? What’s a Tech Field Day/Network Field Day? Most of […]

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No Alarms May Not Mean No Problems

Network monitoring is often a reactive process. Engineers see an alarm, and take action. Alarms mean someone broke something, and it needs attention. Deal with the alarms, and all will be well. No alarms == Good. But every now and then no alarms means that monitoring is broken. Here’s an example of where this happened, and what […]

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Who Said Comments Are Dead?

We don’t see as many comments on blog posts these days, as most discussion has moved to other forums, such as Twitter or Google+. But this doesn’t mean that comments are completely dead. In his book on Technical Blogging, Greg Ferro says that comment volumes have dropped over the last few years: “Five years ago I […]

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HPN Script Repository on GitHub

Dobias van Ingen is working to get an HP Networking scripting community together. This is to take advantage of various HPN scripting capabilities, such as: Comware 7 provides support for Python and TCL Comware 7 also provides support for NETCONF IMC provides extensive eAPI support HP VAN SDN controller provides API support There is now […]

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SNMP Counters – Collection Interval Variation

Counter data types are commonly used in SNMP monitoring. They are extremely useful, but there’s a couple of caveats around how to use them. Here’s a couple of issues I’ve come across: What are Counters? From RFC 2578: The Counter32 type represents a non-negative integer which monotonically increases until it reaches a maximum value of […]

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CloudFlare: That Was Easy

I switched this blog over to using CloudFlare a few days ago. It’s all been pretty painless, and I highly recommend it to others. What is CloudFlare, and Why Use It? CloudFlare “protects and accelerates any website online.” It does this by acting as a reverse proxy, sitting between end-users and your website. All traffic to your […]

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APNIC – final ‘final’ /22 now available

APNIC entered their “final /8” phase in April 2011. From that time, new and existing APNIC members could request a maximum of one IPv4 /22 prefix. Once you had requested your final /22, that was it. No more IPv4 addresses for you. Or was it? APNIC & IANA have been rummaging around down the back […]

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