Hi,
Regarding your product :
- HP E3500 : MSTP without instance (Only CIST, or instance 0) configure as root (priority 0)
- Cisco 2960 : MSTP without instance (Only CIST, or instance 0) configure as non-root (priority 16384)
- Cisco 2950 : Rapid-PVST configure as non-root (priority 16384)
For MST switchs you need to configure a region name and a revision id identical for all devices. Use the latest IOS for Cisco switchs to be sure that MSTP is not implemented in its pre-standard state but full IEEE.
Bye,