The value of this object identifies the path calculation standard of the MSTP process.
The value can be:
1: indicates dot1d-1998, which is the IEEE 802.1d standard proposed in 1998
2: indicates dot1t, which is the IEEE 802.1t standard
3: indicates legacy, which is the calculation standard developed by Huawei
By default, the path calculation standard of an MSTP process is dot1t.