ZyXEL Communications GS3700 Series Guide de l'utilisateur télécharger pdf (Page 114)

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Chapter 11 Spanning Tree Protocol

GS3700/XGS3700 Series User’s Guide

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In the following example, there are two RSTP instances (MRSTP1 and MRSTP2) on switch A.

Figure 62 MRSTP Network Example

To set up MRSTP, activate MRSTP on the Switch and specify which port(s) belong to which spanning

tree.

Note: Each port can belong to one STP tree only.

11.1.5 Multiple STP

Multiple Spanning Tree Protocol (IEEE 802.1s) is backwards compatible with STP/RSTP and

addresses the limitations of existing spanning tree protocols (STP and RSTP) in networks to include

the following features:

• One Common and Internal Spanning Tree (CIST) that represents the entire network’s

connectivity.

• Grouping of multiple bridges (or switching devices) into regions that appear as one single bridge

on the network.

• A VLAN can be mapped to a specific Multiple Spanning Tree Instance (MSTI). MSTI allows

multiple VLANs to use the same spanning tree.

• Load-balancing is possible as traffic from different VLANs can use distinct paths in a region.

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