68RRPP configuration examplesSingle ring configuration exampleNetworking requirementsAs shown in Figure 18,• Device A, Device B, Device C, and Device D form RRPP domain 1. Specify the primary control VLANof RRPP domain 1 as VLAN 4092. RRPP domain 1 protects VLANs 1 through 30.• Device A, Device B, Device C, and Device D form primary ring 1.• Specify Device A as the master node of primary ring 1, GigabitEthernet 1/0/1 as the primary portand GigabitEthernet 1/0/2 as the secondary port.• Specify Device B, Device C, and Device D as the transit nodes of primary ring 1. Specify theirGigabitEthernet 1/0/1 as the primary port and GigabitEthernet 1/0/2 as the secondary port.Figure 18 Network diagramConfiguration procedure1. Configure Device A:# Create VLANs 1 through 30, map these VLANs to MSTI 1, and activate the MST regionconfiguration. system-view[DeviceA] vlan 1 to 30[DeviceA] stp region-configuration[DeviceA-mst-region] instance 1 vlan 1 to 30[DeviceA-mst-region] active region-configuration[DeviceA-mst-region] quit# Cancel the physical state change suppression interval setting on GigabitEthernet 1/0/1 andGigabitEthernet 1/0/2, disable the spanning tree feature, and set the trusted packet priority typeto 802.1p priority. Configure the two ports as trunk ports, and assign them to VLANs 1 through30.[DeviceA] interface gigabitethernet 1/0/1[DeviceA-GigabitEthernet1/0/1] undo link-delay[DeviceA-GigabitEthernet1/0/1] undo stp enable
