I need to connect several machines to the internet for work purposes. However, each workstation only has 1 LAN port. To get around this, I tried to connect a switch to the LAN port to "grab" multiple links from the LAN port. The setup goes something like this :
Internet <---> CISCO SWITCHES <---> Workstation LAN port <---> My switch <---> My systems
I soon realized each LAN port could only support a limited number of links, and that this was a hard limitation imposed by the IT department at the cisco switch level. They had set a limit on the number of MAC addresses each LAN port would support, beyond which it would start dropping links.
I had a brief chat with the network administrator, who only had the time to explain briefly that the spanning tree on the switches might go nuts and potentially bring down the entire network if he did not have the limitation in place.
My limited understanding of STP is that it is used to prevent loops in a switched network. But how would my proposed setup potentially bring down the entire network without the MAC address limitation?