Table 8-3
Port status
Port
Status
Description
Forwardi
ng
A port in the Forwarding state can send and receive BPDUs as well as
forward user traffic.
Learning
This is a transition state. A port in the Learning state learns MAC addresses
from user traffic to construct a MAC address table.
In the Learning state, the port can send and receive BPDUs, but cannot
forward user traffic.
Discardi
ng
A port in the Discarding state can only receive BPDUs.
The port status is not determined by the port role.
lists the port status supported
by each port role.
Table 8-4
Status of port roles
Port
Status
Root Port/
Master
Port
Designate
d Port
Regional
Edge Port
Alternate
Port
Backup
Port
Forwardi
ng
Yes
Yes
Yes
No
No
Learning
Yes
Yes
Yes
No
No
Discardi
ng
Yes
Yes
Yes
Yes
Yes
Yes: The port supports this status.
No: The port does not support this status.
8.2 MSTP Features Supported by the AR3200
Before configuring MSTP, familiarize yourself with the concepts of basic MSTP functions,
topology convergence, MSTP protection, and MSTP interoperability between Huawei devices
and non-Huawei devices.
MSTP is used to block redundant links on the Layer 2 network and trim a network into a loop-
free tree. In MSTP, multiple MSTIs can be created and VLANs are mapped into different
instances to load-balance VLAN traffic. The basic configuration roadmap for MSTP is as
follows:
1.
In a ring network, divide regions and create different instances for regions.
2.
Select a switching device to function as the root bridge for each instance.
Huawei AR3200 Series Enterprise Routers
Configuration Guide - LAN
8 MSTP Configuration
Issue 02 (2012-03-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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