I just wrote about the vpc technologies, and I have two questions
1. I didn't understand what can cause a case of a duplicate system ID in several vpc peers.
I underrated that stp and the lacp use the system ID for their calculations, but what exactly can go wrong if there is a duplicate?
I know that can be the issue when there is a duplicate in end devices, because the data need to be delivered for specific place, but in here it just for syn packets and algorithm calculations, so does it can cause a data loss of host/server communications?
Maybe there are network typologies that it won't disturb (for example, two core nexus that are vpc peers that working in L3, and all the other vpc peers are just for L2 communication, that connected to the core nexus)?
2.I wrote that in peer link is generally used only for the control plane, and not for the data plane.
The reason for this that was mention was that usually the BW of the peer link lines are low then the BW of the lines that participate in the vpc port channels that goes to the downstream devices. So does its means that the peer link not used usually for send data (from servers, hosts), or not used for send information of the data plane of each vpc peer?