DELL S6000-ON User Manual

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Important Points to Remember

• STP is disabled by default.
• The Dell Networking OS supports only one spanning tree instance (0). For multiple instances, enable 

the multiple spanning tree protocol (MSTP) or per-VLAN spanning tree plus (PVST+). You may only 

enable one flavor of spanning tree at any one time.

• All ports in virtual local area networks (VLANs) and all enabled interfaces in Layer 2 mode are 

automatically added to the spanning tree topology at the time you enable the protocol.

• To add interfaces to the spanning tree topology after you enable STP, enable the port and configure it 

for Layer 2 using the switchport command.

• The IEEE Standard 802.1D allows 8 bits for port ID and 8 bits for priority. The 8 bits for port ID provide 

port IDs for 256 ports.

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Spanning Tree Protocol (STP)