Command Manual – MSTPH3C S3100-52P Ethernet Switches Chapter 1 MSTP Configuration Commands1-34To make a switch compatible with STP/RSTP, MSTP provides following three operatingmodes:z STP-compatible mode, where a switch sends out STP BPDUsz RSTP-compatible mode, where a switch sends out RSTP BPDUsz MSTP mode, where a switch sends out MSTP BPDUsRelated command: stp mcheck, stp, stp interface, and stp interface mcheck.Example# Configure the MSTP-enabled switch to operate in STP-compatible mode. system-viewSystem View: return to User View with Ctrl+Z.[H3C] stp mode stp1.1.32 stp no-agreement-checkSyntaxstp no-agreement-checkundo stp no-agreement-checkViewEthernet port viewParameterNoneDescriptionUse the stp no-agreement-check command to enable the rapid transition feature on aport.Use the stp no-agreement-check command to disable the rapid transition feature.By default, the rapid transition feature is disabled on a port.Some manufactures' switches adopt proprietary spanning tree protocols that aresimilar to RSTP in the way to implement rapid transition on designated ports. When aswitch of this kind operates as the upstream switch of a H3C series switch runningMSTP, the upstream designated port fails to change their states rapidly.The rapid transition feature aims to resolve this problem. When a H3C series switchrunning MSTP is connected in the upstream direction to another manufacture's switchadopting proprietary spanning tree protocols, you can enable the rapid transitionfeature on the ports of the H3C series switch operating as the downstream switch.Among these ports, those operating as the root ports will then actively send agreementpackets to their upstream ports after they receive proposal packets from the upstream
