Loops will cause broadcast storms, thereby exhausting network resources and paralyzing the
network. Loops also cause flapping of MAC address tables and thus damages MAC address
entries.
STP/RSTP can be deployed on a network to eliminate loops. If a loop is detected, STP/RSTP
blocks one port to eliminate the loop.
As shown in Figure 8-2, Switch A, Switch B, Switch C, and Switch D form a ring network, and
STP/RSTP is enabled on the ring network to eliminate loops.
Figure 8-2 Diagram of a ring network
SwitchA
SwitchC
SwitchB
SwitchD
PC1
PC2
Network
Blocked port
Root
Bridge
NOTE
If the current switching device supports STP and RSTP, RSTP is recommended.
Pre-configuration Tasks
Before configuring basic STP/RSTP functions, complete the following task:
l Connecting interfaces and setting physical parameters for the interfaces to ensure that the
physical status of the interfaces is Up
Data Preparation
To configure basic STP/RSTP functions, you need the following data.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 8 STP/RSTP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
389
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