The stp binding process link-share command adds an interface to multiple MSTP processes for status calculation.
The undo stp binding process command removes the interface from status calculation of a certain MSTP process.
By default, an interface enabled with MSTP participates only in the status calculation of MSTP process 0.
stp binding process process-id1 [ to process-id2 ] link-share
undo stp binding process process-id1 [ to process-id2 ]
| Parameter | Description | Value |
|---|---|---|
| process-id1 | Specifies the ID of the start MSTP process. | The value is an integer ranging from 1 to 31. |
| to process-id2 | Specifies the ID of the end MSTP process. | The value is an integer ranging from 1 to 31. |
Ethernet interface view, GE interface view, XGE interface view, MultiGE interface view, 40GE interface view, 100GE interface view, Eth-Trunk interface view, port group view, 25GE interface view
Usage Scenario
On a Layer 2 network running MSTP, the link shared by multiple access rings is called a public link. A port on a public link participates in the spanning tree calculation for multiple MSTP processes and access rings. As a result, the port may have multiple statuses. Which spanning tree status can be used as the port status cannot be determined. To prevent this situation, the stp binding process link-share command can be used to add this port to an MSTP process. Then, the port always uses its status in MSTP process 0 after participating in the calculation for multiple MSTP processes.
Precautions
After the stp binding process link-share command is run on a port, the port will perform the following operations:
Participates in the status calculation of a specified MSTP process without affecting packet forwarding of this MSTP process.
Participates in the 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.
The port configured with the stp binding process link-share command must be a port on the public link between devices configured with MSTP multi-process, but not a port that connects an access ring and a device.
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 a port that is added to the process in link-share mode, you must run the stp enable command in the interface view to enable MSTP.
For a port that is added to the process in link-share mode, the port participates in status calculation of MSTP process 0. Therefore, you must run the stp enable command to enable MSTP for process 0.
# Configure the port to participate in the status calculation of MSTP process 1 and MSTP process 2.
<HUAWEI> system-view [HUAWEI] stp process 1 [HUAWEI-mst-process-1] quit [HUAWEI] stp process 2 [HUAWEI-mst-process-2] quit [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] stp binding process 1 to 2 link-share