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AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S V200R009 CLI-based Configuration Guide - Ethernet Switching

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Application Scenarios for MSTP

Application Scenarios for MSTP

This section describes the applicable environment of MSTP.

Application of MSTP

Figure 12-11  Networking diagram for a typical MSTP application

MSTP allows packets in different VLANs to be forwarded by using different spanning tree instances, as shown in Figure 12-11. The configurations are as follows:

  • All devices on the network belong to the same MST region.

  • VLAN 10 packets are forwarded within MSTI 1; VLAN 30 packets are forwarded within MSTI 3; VLAN 40 packets are forwarded within MSTI 4; VLAN 20 packets are forwarded within MSTI 0.

In Figure 12-11, S1 and S2 are devices at the aggregation layer; S3 and S4 are devices at the access layer. Traffic from VLAN 10 and VLAN 30 is terminated by aggregation devices, and traffic from VLAN 40 is terminated by the access device. Therefore, S1 and S2 can be configured as the roots of MSTI 1 and MSTI 3, and S3 can be configured as the root of MSTI 4.

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Updated: 2019-05-17

Document ID: EDOC1000174108

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