Dell PowerConnect W-7200 Series Reference Manual page 1412

spanning-tree forward-time 3
The following command sets the time the root bridge waits to transmit BPDUs to 4 seconds:
spanning-tree hello-time 4
The following command sets the time the root bridge waits to receive a hello packet to 30 seconds:
spanning-tree max-age 30
The following command sets the bridge priority to 10, making it more likely to become the root bridge:
spanning-tree priority 10
The follow command sets a spanning-tree VLAN range
spanning-tree vlan range 2-8,11
Command History
Release
ArubaOS 6.0
ArubaOS 3.4
ArubaOS 1.0
Command Information
Platforms
All platforms
1412 | spanning-tree (Global Configuration)
Modification
Added support for PVST+ and VLAN and VLAN Range
Upgraded STP to RSTP with full backward compatibility
Introduced the Spanning Tree Protocol (STP)
Licensing
Base operating system
Command Mode
Configuration (config)
Dell PowerConnect W-Series ArubaOS 6.2 | Reference Guide