To get the background of this question please follow this link http://security.stackexchange.com/questions/14803/using-nessus-an-alien-packet-from-switch-shut-down-my-ethernet-card-completely
I have just come out from troubleshooting one specific problem relating to nessus scans and disabling of NIC port. To overcome it i had to switch off vmware networking services (as it was sending vtp updates to switch). This solution pretty much solved my problem.
However, for some connectivity issues i don't want to disable these services for the scans- is there a way i can prevent these updates effecting / coming to switch. Is there a command that would prevent this from happening at the switch level.
Update Yeah you are right the whole debate started with stp but when i read from internet that vmware by default sends out vtp updates. So, the focus shifted from stp to vtp.