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Configuration Guide - Ethernet Switching

CloudEngine 8800, 7800, 6800, and 5800 V200R003C00

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, MUX VLAN, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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Configuring Basic MSTP Functions

Configuring Basic MSTP Functions


MSTP divides a switching network into multiple regions, each of which has multiple spanning trees that are independent of each other. MSTP isolates traffic from different VLANs and load-balances VLAN traffic.

MSTP is configured on switching devices to trim a ring network to a loop-free network. Devices start spanning tree calculation after the working mode is set and MSTP is enabled. Use any of the following methods if you need to intervene in the spanning tree calculation:

  • Manually configure the root bridge and secondary root bridge.

  • Set a priority for a switching device in an MSTI. The lower the numerical value, the higher the priority of the switching device and the more likely the switching device becomes a root bridge.

  • Set the path cost for a port in an MSTI. The lower the numerical value, the smaller the cost of the path from the port to the root bridge and the more likely the port becomes a root port (assuming the same calculation method is used).

  • Set a priority for a port in an MSTI. The lower the numerical value, the more likely the port becomes a designated port.

Updated: 2019-05-08

Document ID: EDOC1100004351

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