Bits, Bytes, & Radio Waves

A quiet journey through discovery and understanding.

  • Dynamic Trunking Protocol (DTP)

    Dynamic Trunking Protocol is a Cisco proprietary protocol used to negotiate trunks between Cisco devices. To autonegotiate trunking, the interfaces must be in the same VLAN Trunking Protocol (VTP) domain. Trunk negotiation is managed by the Dynamic Trunking Protocol, which is a point-to-point protocol. Configure Switch# configure terminal Switch(config)# interface interface-id Switch(config-if)# switchport mode {access…

  • Virtual Local Area Network (VLAN)

    A Virtual Local Area Network or VLAN is a way to logically break up broadcast domains. VLAN = Subnet = Broadcast Domain When using multiple switches, you have to ensure that the VLAN is configured on any switch that will use the VLAN. Since a VLAN defines broadcast domains in a Layer 2 network, in…

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