Network design, architecture, thinking, working. Tech.
Vitaly left a comment on a blog post with a clever IOS CLI Regex tip. I though I would pick that apart as an exercise.
Quick tip for m
There is so much to talk about in Networking today. I can’t remember a time in the last decade where so much is changing, and so many new technologies. I’m finding it harder and harder to keep up – there is a lot of topics to discuss, technology to learn and ideas to understand. Vendors produce white papers, product information and seminars while bloggers produce articles, forums and podcasts but sometimes a little more could help. Enter, our very first event in a new format – Cisco Data Centre Virtual Symposia.
Cisco is known for shipping products early to deliver new features quickly. But this leads to a reputation for buggy code which has customers report bugs (and Cisco fixing them). This means that you should never buy a newly released Cisco product unless you are willing to take this risk. This post looks a my process for analysing this risk and then selecting an IOS version by performing a bug scrub. In this case, I’ve been asked whether the Cisco C3750-X switches are ready for live deployment.
Reading the release notes for ASA 8.6.1 today and noticed this about new models of Cisco ASA Firewalls.
There is a significant numbers of ASA5110 chassis that have been reworked to look and act like ASA5520 or ASA5540 firewalls. Refer this bug toolkit for more details.
Why does Nexus NXOS use ‘switchto’ instead of ‘changeto’ for the CLI ?
In recent months I seem to have hit a lot of bugs in Cisco software. Across the board on the main software releases of IOS, NX-OS or IOS-SX I seem to be hitting a wide range of bugs, and some of them are pretty stupid. And I’ve realised that, in recent years, it has become so commonplace, so accepted that we actually plan our projects with time to test, locate and check for bugs. And that’s become an expensive and time-consuming problem.
Why do we put up with this ?
It’s not common knowledge that Cisco Press publish errata on their website that list the errors in their textbooks. And especially the more complicated textbooks, its reasonably easy for mistakes to get introduced between the author, reviewer and editor and the publishing process. You can find the errata like this:
Recently I noticed that Cisco is selling “Fabric Ethernet Transceivers” for the Nexus switch family. Some research shows that these are replacements for 10GBaseSX SFP modules. Importantly, it’s cheaper to install new cabling than to buy 10BaseSR SFP+ modules.
