Lindsay Hill network control, visibility, management

HP2910al - Memory Leak with W.15.14.0007?

I have an HP 2910al switch in my lab. I was running firmware version W.15.12.0012, but needed to upgrade, to fix a bug where “~” gets added to the snmp community configuration. I tried upgrading to W.15.14.0007, and it initially looked good, but shortly afterwards got alarms from my NMS about high memory usage.

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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.

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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?

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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.

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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?

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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 I do about it.

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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.

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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:

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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:

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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.

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