Cambium Networks cnMatrix EX2028 Handleiding (320 Pagina's)

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L2 Features 45

Troubleshooting RSTP

1. Make sure that the same STP mode is running on all switches.

2. Make sure that the selected root is elected correctly using the lowest bridge priority.

3. Verify the redundant paths and the STP ports has the corresponsive states.

Useful commands for troubleshooting:

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cnMatrix#show spanning-tree

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cnMatrix#show spanning-tree root

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cnMatrix#show spanning-tree interface

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cnMatrix#show spanning-tree vlan

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cnMatrix#show spanning-tree detail

Managing MSTP

FeatureDescription

Caution:

To enable the MSTP functionality, RSTP andPVRST should be disabled.

Feature Overview

The MSTP feature enables VLANs to be grouped into spanning-tree instances, with each instance having

a spanning-tree topology independent of other spanning-tree instances.

The MSTP feature enables the VLAN bridges to use multiple spanning trees, providing traffic belonging

to different VLANs to flow over potentially different paths within the virtual bridged LAN.

Standards

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802.1s

Scaling Numbers

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Up to 8 MSTP instances. The Instance ID can be configured from 1 to 31.

Limitations

N/A

Default Values

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The default value for the forward time of the spanning tree: 15 seconds.

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The default value for the max-age timer of the spanning tree: 20 seconds.

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The default value for the revision number for the MST region: 0.

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The MST instance 0 is created and mapped with all VLANs.

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The default spanning-tree hello time: 2 seconds.

Prerequisites

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