3Com S7906E Configuration Manual page 2178

Figure 1-10 Network diagram for intersecting-ring load balancing configuration
Configuration procedure
1) Configuration on Device A
# Create VLANs 10 and 20, map VLAN 10 to MSTI 1 and VLAN 20 to MSTI 2, and activate MST region
configuration.
<DeviceA> system-view
[DeviceA] vlan 10
[DeviceA-vlan10] quit
[DeviceA] vlan 20
[DeviceA-vlan20] quit
[DeviceA] stp region-configuration
[DeviceA-mst-region] instance 1 vlan 10
[DeviceA-mst-region] instance 2 vlan 20
[DeviceA-mst-region] active region-configuration
[DeviceA-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 10 and VLAN 20.
[DeviceA] interface gigabitethernet 2/0/1
[DeviceA-GigabitEthernet2/0/1] link-delay 0
[DeviceA-GigabitEthernet2/0/1] undo stp enable
[DeviceA-GigabitEthernet2/0/1] port link-type trunk
[DeviceA-GigabitEthernet2/0/1] undo port trunk permit vlan 1
[DeviceA-GigabitEthernet2/0/1] port trunk permit vlan 10 20
[DeviceA-GigabitEthernet2/0/1] quit
[DeviceA] interface gigabitethernet 2/0/2
[DeviceA-GigabitEthernet2/0/2] link-delay 0
[DeviceA-GigabitEthernet2/0/2] undo stp enable
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