Parameter Default Setting
Max Age 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
Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
6 STP/RSTP Configuration
Issue 01 (2014-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
190
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