stp binding process link-share

Function

The stp binding process link-share command configures an interface to participate in status calculation in multiple MSTP processes.

The undo stp binding process command removes an interface from status calculation of a certain MSTP process.

By default, an MSTP interface participates in status calculation only in MSTP process 0.

Format

stp binding process process-id1 link-share

Parameters

Parameter	Description	Value
process-id1	Specifies the ID of an MSTP process.	The value is an integer ranging from 1 to 256.

Parameter

Description

Value

process-id1

Specifies the ID of an MSTP process.

The value is an integer ranging from 1 to 256.

Views

100GE interface view, 10GE interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE interface view, Eth-Trunk interface view, GE optical interface view, GE electrical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mstp	write

Usage Guidelines

Usage Scenario

On a Layer 2 network running MSTP, the link used by multiple access rings is a public link. An interface on the public link participates in the spanning tree calculation for multiple MSTP processes and access rings. Each MSTP process calculates an interface status. As a result, the interface may have multiple status, and which status is used cannot be determined. To prevent this problem, run the stp binding process link-share command to add the interface to multiple MSTP processes. The interface always uses its status in MSTP process 0, although it participates in status calculation in multiple MSTP processes.

Configuration Impact

After the stp binding process link-share command is run on an interface, the interface will perform the following operations:

Participates in status calculation of a specified MSTP process without affecting packet forwarding of this MSTP process.
Participates in status calculation of MSTP process 0, affecting packet forwarding of this MSTP process.
If the stp binding process link-share command is run more than once, all configurations take effect.

Precautions

The interface configured with the stp binding process link-share command must be an interface on the public link between devices configured with the MSTP multi-process, but not an interface that connects a device to an access ring.
If a process has a public link, the stp enable command must be run in the view of this process to enable MSTP globally.
For an interface that is added to a process in link-share mode, you must run the stp enable command in the interface view to enable MSTP.
For an interface that is added to a process in link-share mode, the interface participates in status calculation of MSTP process 0. You must run the stp enable command to enable MSTP for process 0.

Example

# Configure an interface Eth-Trunk1 to participate in status calculation in MSTP processes 1.

<HUAWEI> system-view
[~HUAWEI] stp process 1
[*HUAWEI-mst-process-1] quit
[*HUAWEI] stp process 2
[*HUAWEI-mst-process-2] quit
[*HUAWEI] interface eth-trunk 1
[*HUAWEI-Eth-Trunk1] portswitch
[*HUAWEI-Eth-Trunk1] stp binding process 1 link-share