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Why Cannot Information About an STP Instance with a Non-Zero ID Be Displayed?
The switch supports the MSTP protocol, which is compatible with STP and RSTP. An instance with a non-zero ID takes effect only in MSTP mode. When STP works in STP or RSTP mode, only instance 0 takes effect.
To query information about an instance with a non-zero ID, run the stp mode mstp command to set the STP working mode to MSTP.