Network Mgmt |
Problem Mgmt |
Visual Class Tour
Packet Capture Mechanics
See it, do it, teach it -- that's how I progress from novice to skilled: until I can teach a topic, I don't really understand it. I specialize in facilitating hands-on seminars in which attendees practice real-world techniques for solving issues in IT operations.
Descriptions and slide decks, typically from one-day seminars.
Planning to attend one of these seminars? I recommend:
What do these hands-on classes look like? Typically, you work in groups of two to five, assign roles to each team member, select a particular lab, check-out suitable gear from a side table, develop hypotheses and test them, and discuss the implications of your findings with your teammates. You may bring your own gear in order to develop complex labs: your table gets messy. You'll use open-source toolkits to monitor performance and analyze results; you may choose to visit a virtualized lab environment or check out a commercial tool. Consult with your instructors as needed. Periodically, we come together as a class to hear reports from each team and to highlight larger themes. These photos from Myth-Busting: The Network Layer at LISA 2014 and CasitConf 2015.
Here is my Wireshark Preferences, uploaded 2015-01-05, including Profiles. [Produced on a Windows machine: if you're copying to *nix, run the entire directory through dos2unix first. Or, better yet, upgrade to Wireshark 1.12.0+, which handles both flavors of line termination characters automatically.]
When I copy my Wireshark Preferences to a new machine, I run update-ws-profiles to automate the task of changing IP and MAC addresses in filters.
I want to develop a class around using OS-specific tools to trouble-shoot issues. Herein a few notes in that direction.
Transceivers, speed, and negotiation
My notes around how SFP / SFP+ / QSFP+ ports behave.
Last modified: 2017-March-23