6.6 Configuring STP/RSTP. Huawei AR550 Series, AR530 Series

Huawei AR530&AR550 Series Industrial Switch Routers

Configuration Guide - Ethernet Switching 6 STP/RSTP Configuration

Parameter

Max Age

Default Setting

2000 centiseconds

6.6 Configuring STP/RSTP

This section describes how to configure STP/RSTP.

6.6.1 Configuring Basic STP/RSTP Functions

You can configure STP/RSTP on an Ethernet network to trim the network into a loop-free tree topology.

6.6.1.1 Configuring the STP/RSTP Mode

Context

A switching device supports three working modes: STP, RSTP, and MSTP. Use the STP mode on a ring network running only STP, and use the RSTP mode on a ring network running only

RSTP. In other scenarios, the default MSTP mode is recommended.

Procedure

Step 1 Run: system-view

The system view is displayed.

Step 2 Run: stp mode { stp | rstp }

The working mode of the switching device is set to STP or RSTP.

By default, the working mode of a switching device is MSTP. MSTP is compatible with STP and RSTP.

----End

6.6.1.2 (Optional) Configuring the Root Bridge and Secondary Root Bridge

Context

The root bridge of a spanning tree is automatically calculated. You can also manually specify a root bridge or secondary root bridge.

l A spanning tree can have only one effective root bridge. When two or more devices are specified as root bridges for a spanning tree, the device with the smallest MAC address is used as the root bridge.

l You can specify multiple secondary root bridges for each spanning tree. When the root bridge fails or is powered off, a secondary root bridge becomes the new root bridge. If a

Issue 01 (2014-11-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

190