Brand new beginner (less then 5 hours using packet tracer). Just started building networks with modems. After following several videos online to create a network that will send a simple pdu from an end device to a switch, to a modem, then to another modem, then the switch, then the end device, and all the way back I ran into a problem.
The pdu won't go back to the end device it was sent from. It goes back up to the modem, then back down again. Until it switches to STP and just loops to every switch without stopping. None of the videos I follow have this happen, even when I following them in everyway possible. Any help would be appreciated!
