
N o t e
Multiple Instance
Overview
Overview
The switches covered in this guide, use the IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) standard.
MSTP Features
802.1s Spanning Tree Protocol | Default Setting | Page Ref |
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Viewing MSTP Status and Configuration | n/a | |
Configuring MSTP Operation Mode and | Disabled | |
Global Parameters |
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| following |
Configuring Basic Port Connectivity | ||
Parameters | and | |
| following | |
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| priority: 128 (multiplier: 8) |
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| loop protection: Send disable |
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Configuring MSTP Instance Parameters | instance (MSTPI): none | |
| priority: 32768 (multiplier: 8) |
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Configuring MSTP Instance | ||
Parameters | priority: 128 (multiplier: 8) |
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Enabling/Disabling MSTP Spanning Tree | Disabled | |
Operation |
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Enabling an Entire MST Region at Once | n/a | |
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Without spanning tree, having more than one active path between a pair of nodes causes loops in the network, which can result in duplication of mes- sages, leading to a “broadcast storm” that can bring down the network.
MSTP cannot protect against loops when there is an unmanaged device on the network that drops spanning tree packets, or may fail to detect loops where this is an edge port configured with client authentication (802.1X, Web and MAC authentication). To protect against the formation of loops in these cases, you can use the loop protection feature (see “Loop Protection” on page