Chapter 13 Spanning Tree Protocol
XGS4600 Series User’s Guide
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CHAPTER 13
Spanning Tree Protocol
13.1 Spanning Tree Protocol Overview
The Switch supports Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol (RSTP) and Multiple
Spanning Tree Protocol (MSTP) as defined in the following standards.
• IEEE 802.1D Spanning Tree Protocol
• IEEE 802.1w Rapid Spanning Tree Protocol
• IEEE 802.1s Multiple Spanning Tree Protocol
The Switch also allows you to set up multiple STP configurations (or trees). Ports can then be assigned to
the trees.
13.1.1 What You Can Do
• Use the Spanning Tree Protocol Status screen (Section 13.2 on page 158) to view the STP status in the
different STP modes (RSTP, MRSTP or MSTP) you can configure on the Switch.
• Use the Spanning Tree Configuration screen (Section 13.3 on page 158) to activate one of the STP
modes on the Switch.
• Use the Rapid Spanning Tree Protocol Status screen (Section 13.4 on page 159) to view the RSTP status.
• Use the Rapid Spanning Tree Protocol screen (Section 13.5 on page 161) to configure RSTP settings.
• Use the Multiple Spanning Tree Protocol screen (Section 13.6 on page 163) to configure MSTP.
• Use the Multiple Spanning Tree Protocol Status screen (Section 13.7 on page 169) to view the MSTP
status.
• Use the Multiple Rapid Spanning Tree Protocol screen (Section 13.8 on page 173) to configure MRSTP.
• Use the Multiple Rapid Spanning Tree Protocol Status screen (Section 13.9 on page 175) to view the
MRSTP status.
13.1.2 What You Need to Know
Read on for concepts on STP that can help you configure the screens in this chapter.
(Rapid) Spanning Tree Protocol
(R)STP detects and breaks network loops and provides backup links between switches, bridges or
routers. It allows a switch to interact with other (R)STP-compliant switches in your network to ensure that
only one path exists between any two stations on the network.
The Switch uses IEEE 802.1w RSTP (Rapid Spanning Tree Protocol) that allows faster convergence of the
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