medium access delay (med_access_delay)—This value is the time that is necessary for a device to gain access to the media for initial transmission. It is the time between the CPU decision to send a frame and the moment when the frame effectively begins to leave the bridge. The IEEE recommendation is to use 0.5 sec as the maximum time.
End-to-end BPDU propagation delay—This value is the amount of time that is necessary for a BPDU to travel from one end of the network to the other end. Assume a diameter of seven hops, three BPDUs that can be lost, and a hello time of 2 sec. In this case, the formula is:
Maximum transmission halt delay—This value is the time that is necessary in order to effectively block a port, after the decision to block is made. The IEEE counts 1 sec as the maximum for this event.
https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/19120-122.html
medium access delay (med_access_delay)—This value is the time that is necessary for a device to gain access to the media for initial transmission. It is the time between the CPU decision to send a frame and the moment when the frame effectively begins to leave the bridge. The IEEE recommendation is to use 0.5 sec as the maximum time.
End-to-end BPDU propagation delay—This value is the amount of time that is necessary for a BPDU to travel from one end of the network to the other end. Assume a diameter of seven hops, three BPDUs that can be lost, and a hello time of 2 sec. In this case, the formula is:
Maximum transmission halt delay—This value is the time that is necessary in order to effectively block a port, after the decision to block is made. The IEEE counts 1 sec as the maximum for this event.