1-43Configuring Rapid TransitionConfiguration prerequisitesAs shown in Figure 1-8, a 3Com switch 4500 is connected to another manufacturer's switch. The formeroperates as the downstream switch, and the latter operates as the upstream switch. The networkoperates normally.The upstream switch is running a proprietary spanning tree protocol that is similar to RSTP in the way toimplement rapid transition on designated ports. Port 1 is the designated port.The downstream switch is running MSTP. Port 2 is the root port.Figure 1-8 Network diagram for rapid transition configurationConfiguration procedure1) Configure the rapid transition feature in system viewFollow these steps to configure the rapid transition feature in system view:To do... Use the command... RemarksEnter system view system-view —Enable the rapid transitionfeaturestp interface interface-typeinterface-numberno-agreement-checkRequiredBy default, the rapid transitionfeature is disabled on a port.2) Configure the rapid transition feature in Ethernet port viewFollow these steps to configure the rapid transition feature in Ethernet port view:To do... Use the command... RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Enable the rapid transitionfeature stp no-agreement-checkRequiredBy default, the rapid transitionfeature is disabled on a port.
