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Configuring Spanning Trees as Hitless
Important Points to Remember
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STP is disabled by default.
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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.
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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.
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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.
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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.
Spanning Tree Protocol (STP)
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