Huawei quidway s7700 - Configuring Share-Link Protection on a Switching Device

the NMS that the port enters the Discarding state. The blocked port remains in the Blocked state
and no longer forwards packets. This prevents loops on the network. The root port restores the
Forwarding state after receiving new BPDUs.
NOTE
An alternate port is a backup port of a root port. If a switching device has an alternate port, you need to
configure loop protection on both the root port and the alternate port.
Do as follows on a root port and an alternate port on a switching device in an MST region:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The Ethernet interface view is displayed.
Step 3 (Optional) Run:
stp binding process process-id
The port is bound to an MSTP process.
NOTE
This step is performed only when the interface needs to be bound to an MSTP process with a non-zero ID.
If the interface belongs to process 0, skip this step.
Step 4 Run:
stp loop-protection
Loop protection for the root port is configured on the switching device.
By default, loop protection is disabled.
----End
9.5.6 Configuring Share-Link Protection on a Switching Device
The share-link protection function on a switching device helps automatically transition to the
RSTP working mode. It can also be used together with root protection to avoid network loops.
Context
Share-link protection is used in the scenario where a switching device is dual homed to a network.
When a share link fails, share-link protection forcibly changes the working mode of a local
switching device to RSTP. This function can also be used together with root protection to avoid
network loops.
Procedure
Step 1 Run:
system-view
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 9 MSTP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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