Spanning Tree Configuration Command Set
Configuring Spanning Tree Loop Protect Features
6-120 Matrix DFE-Platinum and Diamond Series Configuration Guide
• set spantree disputedbpduthreshold (Section 6.2.3.18) 
• show spantree disputedbpduthreshold (Section 6.2.3.19)
• clear spantree disputedbpduthreshold (Section 6.2.3.20)
• show spantree nonforwardingreason (Section 6.2.3.21)