Computer Using Cat

Let People Choose Their Own Tools

Why is it that people will pay a lot of money for a consultant’s time and expertise, but then hobble them by limiting the tools they can use? Chris Wahl has written about learning to cope with the default tools and settings: It’s almost a given that anything I own – personally or via my employer – […]

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Rant: Just stop it with the TFTP

TFTP was first defined in 1980. That is a very long time ago in IT, and while it’s s had a good run, it’s time for network engineers to stop using TFTP. It’s slow, insecure, and there are better options available. TFTP is an unauthenticated, plain-text file transfer protocol. It is commonly used by network engineers to transfer […]

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Fibre Optic Cable in Telstra Pit

Vocus Acquisition of FX: Good for Customers?

Consolidation is happening in the New Zealand wholesale ISP market, with Vocus acquiring FX. Consolidation can lead to less competition, or it can strengthen it, by making players stronger and more viable. This acquisition should strengthen the market, and hopefully open up new service offerings. In July Vocus Communications announced its intention to acquire FX […]

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CPUG, and The Risk of Single-Admin Communities

CPUG, a Check Point user forum, is near death. The owner has been forced to get rid of it, but rather doing a graceful handover, it has been shut down pending a possible sale. This is a great shame, and it highlights the risks of contributing to a forum controlled by a single person. […]

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Writing on the Wall

HP OMW: Still Kicking, But Only Just

A year ago I asked “Has HP Abandoned Operations Manager?” There had been no significant development for a long time, and the signs were that HP was moving away from OM to OMi. Last week HP made a move that confirms my original thinking: It’s dead (it just doesn’t know it yet). HP released a […]

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HP NNMi 10.00 Released

HP NNMi version 10.0 has been released. This is a good release, with many usability enhancements. I’m pleased to see continued development, as the future nirvana of all-powerful software defined networks hasn’t quite arrived yet. For now, we still have to manage our networks the old-fashioned way: SNMP is still alive & kicking. NNMi – Background […]

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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 the “logging host” command. Compliance Checks At a customer site I use HP IMC to perform compliance checks across HP and Cisco networking gear. This has […]

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War Stories: Gratuitous ARP and VRRP

This entry is part 6 of 6 in the series War Stories

Continuing our theme of ARP-related war stories, here’s another ARP/switching behaviour I’ve come across. This particular problem didn’t result in any outages, but the network wasn’t working as well as it should have, and started flooding frames unexpectedly. Here’s what was going on: The Network Breaking the network down to its simplest level, it looked like this: The […]

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What Happens When 20 Programs Poll The Network?

Packetpushers show 198 was a great episode about Network Automation. At one point, Greg asks: “What happens when you’ve got 20 apps polling one device?” Well, you might hit the same problem I did: SECURITY-SSHD-6-INFO_GENERAL : Incoming SSH session rate limit exceeded I have some Python scripts that poll performance and configuration data from a couple of […]

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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 why ScienceLogic introduced this feature, and what it does. Problem: A Single Database I’ve talked before about the ScienceLogic architecture, and noted that the Database […]

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