Bits, Bytes, & Radio Waves

A quiet journey through discovery and understanding.

  • Point-to-Point Link

    Configure To configure a Point-to-Point link, you will configure the serial interface just like you would an Ethernet interface. In addition, you need to use the no shutdown command because interfaces are down by default on a router. The other difference is that you need to have a clocking mechanism in place. Clocking takes place…

  • EtherChannel

    EtherChannel is a way to provide redundant links and not be affected by Spanning Tree Protocol (STP). By design, when you connect multiple links to switches, STP will shut down the excess links to prevent loops. There is a Cisco version and an IEEE version. Cisco’s is called Port Aggregation Protocol (PAgP), and the IEEE…

  • Add and Remove VLANs on a Trunk

    Where access ports allow for only one data VLAN and one voice VLAN, a trunk port can carry one or more VLANs. Generally, you would use a trunk to connect switches together where you need to carry traffic. In some cases, you would configure a trunk port to connect to a server, such as a…

Notes from practice

I use this site to document systems, configurations, and lessons learned as I work through real problems—both professionally and through personal experimentation. The goal is clarity: understand how something works, explain why it behaves the way it does, and make it reliable and repeatable.

These notes are written primarily for myself, but shared openly in case they help someone else avoid a dead end or reduce frustration. If you’d like to learn more, visit the About page.

If you have questions or comments, you’re always welcome to contact me.

Aaron Rombaut

Technologist & Writer