Bits, Bytes, & Radio Waves

A quiet journey through discovery and understanding.

  • 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…

  • Assigning Switch Ports to VLANs

    Interfaces on Cisco switches can belong to two VLANs, one for data traffic and one for voice traffic. You set the interface to be an access port. This also turns off trunking and VLAN Trunking Protocol (VTP). Configure The following command will configure an access port. An access port is intended for data traffic. Switch#configure…

  • Default Virtual Local Area Network (VLAN)

    The default virtual local area network (VLAN) is 1 by default on any Cisco switch. It is a special VLAN in that it cannot be changed or deleted. It is a management VLAN that carries control protocols such as Cisco Discovery Protocol (CDP), VLAN Trunking Protocol (VTP), Port Aggregation Protocol (PagP), and Dynamic Trunking Protocol…

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