3Com S7906E Configuration Manual page 2184

[DeviceD-rrpp-domain1] control-vlan 100
[DeviceD-rrpp-domain1] protected-vlan reference-instance 1
# Configure Device D as the transit node of primary ring 1 in RRPP domain 1, with GigabitEthernet 2/0/1
as the primary port and GigabitEthernet 2/0/2 as the secondary port, and enable ring 1.
[DeviceD-rrpp-domain1]
secondary-port gigabitethernet 2/0/2 level 0
[DeviceD-rrpp-domain1] ring 1 enable
[DeviceD-rrpp-domain1] quit
# Create RRPP domain 2, configure VLAN 105 as the primary control VLAN of RPPP domain 2, and
configure the VLAN mapped to MSTI 2 as the protected VLAN of RRPP domain 2.
[DeviceD] rrpp domain 2
[DeviceD-rrpp-domain2] control-vlan 105
[DeviceD-rrpp-domain2] protected-vlan reference-instance 2
# Configure Device D as the transit node of primary ring 1 in RRPP domain 2, with GigabitEthernet 2/0/1
as the primary port and GigabitEthernet 2/0/2 as the secondary port, and enable ring 1.
[DeviceD-rrpp-domain2]
secondary-port gigabitethernet 2/0/2 level 0
[DeviceD-rrpp-domain2] ring 1 enable
[DeviceD-rrpp-domain2] quit
# Enable RRPP.
[DeviceD] rrpp enable
5) Configuration on Device E
# Create VLAN 20, map VLAN 20 to MSTI 2, and activate MST region configuration.
<DeviceE> system-view
[DeviceE] vlan 20
[DeviceE-vlan20] quit
[DeviceE] stp region-configuration
[DeviceE-mst-region] instance 2 vlan 20
[DeviceE-mst-region] active region-configuration
[DeviceE-mst-region] quit
# Configure the suppression time of physical-link-state changes on GigabitEthernet 2/0/1 and
GigabitEthernet 2/0/2 as zero, disable STP, configure the two ports as trunk ports, remove them from
VLAN 1, and assign them to VLAN 20.
[DeviceE] interface gigabitethernet 2/0/1
[DeviceE-GigabitEthernet2/0/1] link-delay 0
[DeviceE-GigabitEthernet2/0/1] undo stp enable
[DeviceE-GigabitEthernet2/0/1] port link-type trunk
[DeviceE-GigabitEthernet2/0/1] undo port trunk permit vlan 1
[DeviceE-GigabitEthernet2/0/1] port trunk permit vlan 20
[DeviceE-GigabitEthernet2/0/1] quit
[DeviceE] interface gigabitethernet 2/0/2
[DeviceE-GigabitEthernet2/0/2] link-delay 0
[DeviceE-GigabitEthernet2/0/2] undo stp enable
[DeviceE-GigabitEthernet2/0/2] port link-type trunk
ring 1 node-mode transit
ring 1 node-mode transit
1-33
primary-port gigabitethernet
primary-port gigabitethernet
2/0/1
2/0/1