Bits, Bytes, & Radio Waves

A Journey Through Discovery

  • Link State Advertisements (LSA) Types

    Routers have to agree on certain parameters (such as timers and being on a common subnet) before they can become neighbors. After its neighbor routers are discovered, the router determines whether it should exchange routes with those neighbors. (If they decide to do so, they become adjacent.) If they are adjacent, they begin to exchange…

  • Defining the Message Severity Level

    You can set the severity level of messages according to the level of detail you need. You can also control the destinations of the messages. Configure The following command will set the logging to the console, this is the default. Switch#configure terminal Switch(config)#logging console Switch(config)#end If you want to send logs to a syslog server,…

  • Terribly Embarrassing Admin Moment

    I am still quite new to WordPress. I was finally able to get time to clean out my basement, cobble together an old PC and get my favorite flavor of Linux installed. Of course, there was an unnecessary struggle there, but I won’t get into details. Low and behold, I am up and running. About…

  • 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…

This is how it all started…

I started this site with the intent to aggregate as much information as possible in one place. I use this to record lessons learned or frustrating configurations I have experienced on the job or just tinkering (learning) and just couldn’t find a better resource available. I have tried to be as thorough and accurate as possible, but technology is rapidly evolving and every environment is different. I may miss things along the way and my setup most likely differs compared to yours.

I hope you find this site has some value to you.

Welcome to Bits, Bytes, and Radio Waves! 

If you have any questions or comments (or just want to give me a shout-out), please feel free to contact me!

Aaron Rombaut

Writer & Technologist