TSHOOT – Layer 2 troubleshooting of Trunks, VTP, and VLANs!

The troubleshooting of Layer 2 issues seems like it may be the easiest, as the information is really taught quite thorough at the CCNA level, however there are some caveats that are potential exam landmines for TSHOOT to avoid on exam day! First I want to start with some verification commands that are critical for … Continue reading TSHOOT – Layer 2 troubleshooting of Trunks, VTP, and VLANs!

SWITCH Lab – Manual VLAN Pruning on Trunk interfaces, STP / EtherChannel behaviors, SWITCH and TSHOOT lab!

I started freestyle labbing to review some topics, and found some interesting behaviors along the way I wanted to make note of here, so this will be more of a troubleshooting / behaviors demonstration than a configuration of any particular topic. The topic I went with here is creating VLANs local to their respective switches, … Continue reading SWITCH Lab – Manual VLAN Pruning on Trunk interfaces, STP / EtherChannel behaviors, SWITCH and TSHOOT lab!

VTP – Is it on by default? IMPORTANT default behaviors, while demonstrating a simple VTP configuration (and breaking it)!

After truly resetting all switches so no VLANs exist outside defaults, no trunks are configured, etc I will build the above Topology through this segment (though I may only work on portions and lead up to the it as a whole at the end). Now for those who haven't tested for CCNA recently, VTP is … Continue reading VTP – Is it on by default? IMPORTANT default behaviors, while demonstrating a simple VTP configuration (and breaking it)!

Configuring two broadcast domains, but creating one big problem, and some real world info!

That's right, we've gotten back to my crappy Paint topologies, as we all have come to know and love them. So given I don't have laptops around that I can piece into this home lab, I will be using a couple of my NBMA routers (2600XM series) as hosts C and D, while hosts A … Continue reading Configuring two broadcast domains, but creating one big problem, and some real world info!

VLANS: Static VLAN need to knows, configuration, verification, and troubleshooting on the CLI!

This is the most basic VLAN graphic you could possibly find, it looks almost from the old CCNA v1 exam, however it perfectly illustrates the functions of VLANs! Just as ports on a switch break up "collision domains," VLANs break up "broadcast domains," which is not only required for traffic separation but also broadcast traffic … Continue reading VLANS: Static VLAN need to knows, configuration, verification, and troubleshooting on the CLI!