Rapid spanning tree protocol, Theory – Interlogix GE-DSH-73 Series User Manual User Manual
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Chapter 5: Web-Based Management
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GE-DSH-73/DSH-82 and DSH-82-PoE User Manual
• You can modify the VLAN group name and VLAN ID.
Figure 5-37: Group Configuration interface
• Click APPLY.
Rapid Spanning Tree Protocol
The Rapid Spanning Tree Protocol (RSTP) is an evolution of the Spanning Tree Protocol 
and provides for faster spanning tree convergence after a topology change. The 
system also supports STP and the system will auto-detect the connected device that 
is running STP or RSTP protocol. 
Theory
The Spanning Tree protocol can be used to detect and disable network loops, and to 
provide backup links between switches, bridges or routers. This allows the switch to 
interact with other bridging devices in your network to ensure that only one route 
exists between any two stations on the network, and provide backup links, which 
automatically take over when a primary link goes down. The spanning tree 
algorithms supported by this switch include these versions: 
• STP - Spanning Tree Protocol (IEEE 802.1D) 
• RSTP - Rapid Spanning Tree Protocol (IEEE 802.1w) 
The IEEE 802.1D Spanning Tree Protocol and IEEE 802.1W Rapid Spanning Tree 
Protocol allow for the blocking of links between switches that form loops within the 
network. When multiple links between switches are detected, a primary link is 
established. Duplicated links are blocked from use and become standby links. The 
