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.
Many people have attempted to prove that OpenFlow creates disintermediation of the hardware market dominated by Cisco, Juniper etc. In fact, it’s allow these vendors to bring the very best of their core values to Software Defined Networking.
It’s a common discussion about when Cisco VTP protocol is actually forwarded through Cisco switches and when it’s isn’t. I’ve always gotten it somewhat confused and when I stumbled across some old notes on the topic I had an ah-hah moment. I’m answering the equation about when using VTP in your network, which versions are risky – that’s risky is terms of how do you prevent VTP updates from ‘crossing’ a switch.
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.
This article made me laugh. John Chambers is trying to rewrite history here.
Oh my. Cisco thinks MPLS is too complicated for Enterprises so it’s invented a new proprietary protocol called EVN (Easy Virtual Network).
Why does Nexus NXOS use ‘switchto’ instead of ‘changeto’ for the CLI ?
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.
It’s been a long time coming but this EOL/EOS notice from Cisco on the MGX family signals the final death throes for ATM.
