ZyXEL Communications GS2220 Series - Spanning Tree Protocol; Spa Nning T Re E Pro to C O L; Spanning Tree Protocol Overview; What You Can Do

Chapter 13 Spanning Tree Protocol
GS2220 Series User’s Guide
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C HAPTER 13
Spa nning Tre e Pro to c o l
13.1 Spa nning Tre e Pro to c o l O ve rvie w
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 Wha t You C a n Do
• Use the Spa nning Tre e Pro to c o l Sta tus screen (
Section 13.2 on page 164) to view the STP status in the
different STP modes (RSTP, MRSTP or MSTP) you can configure on the Switch.
• Use the Spa nning Tre e C o nfig ura tio n screen (Section 13.3 on page 164) to activate one of the STP
modes on the Switch.
• Use the Ra pid Spa nning Tre e Pro toc o l Sta tus screen (Section 13.4 on page 165) to view the RSTP status.
• Use the Ra pid Spa nning Tre e Pro to c o l screen (
Section 13.5 on page 166) to configure RSTP settings.
• Use the Multiple Spa nning Tre e Protoc o l screen (
Section 13.6 on page 168) to configure MSTP.
• Use the Multiple Spa nning Tre e Protoc o l Sta tus screen (
Section 13.7 on page 172) to view the MSTP
status.
• Use the Multiple Ra pid Spa nning Tre e Pro to c o l screen (Section 13.8 on page 175) to configure MRSTP.
• Use the Multiple Ra pid Spa nning Tre e Pro to c o l Sta tus screen (
Section 13.9 on page 176) to view the
MRSTP status.
13.1.2 Wha t You Ne e d to Kno w
Read on for concepts on STP that can help you configure the screens in this chapter.
(Ra pid) Spa nning Tre e Protoc o l
(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