Job security for the network engineers at TINC garbage disposal company will certainly be in question after this latest batch of trouble tickets! They are up to their old tricks, but this time they have rogue Open Shortest Path First (OSPF) servers, misconfigured Etherchannel links, and mismatched Virtual Routing Redundancy Protocol (VRRP) authentication configured in their network setup! Check out this tutorial on how to attack each of these different network troubleshooting scenarios and see how to resolve each of the issues in question. Enjoy!