Screen Scraping: Still Sucks

I’ve written before about “Why Screen Scraping Sucks.” Well, I can report that nothing has changed. It still sucks. This time I got caught out by the changed behaviour of...

War Stories: Gratuitous ARP and VRRP

This article is Part 6 in a 12-Part Series. Part 1 - War Stories: Loops that Permanently Broke the Network Part 2 - War Stories: Switches Lying about Duplex Mismatches...

What Happens When 20 Programs Poll The Network?

Packetpushers show 198 was a great episode about Network Automation. At one point, Greg asks:

ScienceLogic Global Network Manager

ScienceLogic 7.5 includes many enhancements and new features. One I’m interested in is “Global Manager” which can be used to massively scale out the ScienceLogic architecture. Here’s some more detail on...

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...

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....

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...

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’...

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...

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...

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...

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: