Lenovo ThinkSystem NE2552E Application Manual page 186

4. Configure the following on application switch C:
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NE2552E Application Guide for ENOS 8.4
VLAN 2 is automatically removed from STG 1. By default VLAN 1 remains in
STG 1.
Add port 8 to VLAN 3. Ports 1 and 2 are by default in VLAN 1 assigned to STG 1.
NE2552E(config)# vlan 3
NE2552E(config-vlan)# stg 3
NE2552E(config-vlan)# exit
NE2552E(config)# interface port 8
NE2552E(config-if)# switchport mode trunk
NE2552E(config-if)# exit
If VASA is disabled, enter the following command:
NE2552E(config)# spanning-tree stp 3 vlan 3
VLAN 3 is automatically removed from STG 1. By default VLAN 1 remains in
STG 1.
Switch D does not require any special configuration for multiple Spanning Trees.
Switch D uses default STG 1 only.