Configuring a Proposal/Agreement Mechanism
To enable Huawei Datacom devices to communicate with non-Huawei devices, configure a proper rapid transition mechanism on Huawei devices according to the Proposal/Agreement mechanism on non-Huawei devices.
Context
The rapid transition mechanism is also called the Proposal/Agreement mechanism. Devices currently support the following modes:
- Enhanced mode: The current interface counts a root port when it computes the synchronization flag bit.
An upstream device sends a Proposal message to a downstream device, requesting rapid status transition. After receiving the message, the downstream device sets the port connected to the upstream device as a root port and blocks all non-edge ports.
The upstream device then sends an Agreement message to the downstream device. After the downstream device receives the message, the root port transitions to the Forwarding state.
The downstream device then responds to the Proposal message with an Agreement message. After receiving the message, the upstream device sets the port connected to the downstream device as a designated port, and the designated port transitions to the Forwarding state.
- Common mode: The current interface ignores the root port when it computes the synchronization flag bit.
An upstream device sends a Proposal message to a downstream device, requesting rapid status transition. After receiving the message, the downstream device sets the port connected to the upstream device as a root port and blocks all non-edge ports. The root port then transitions to the Forwarding state.
The downstream device responds to the Proposal message with an Agreement message. After receiving the message, the upstream device sets the port connected to the downstream device as a designated port. The designated port then transitions to the Forwarding state.
When Huawei Datacom devices are interworking with non-Huawei devices, select either mode depending on the Proposal/Agreement mechanism on non-Huawei devices.
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The view of the Ethernet interface participating in STP calculation is displayed.
The following configuration can be configured both on a Layer 2 interface and a Layer 3 interface.
- (Optional) Run stp binding process process-id
The interface is bound to an MSTP process.
This step binds an interface to an MSTP process with a non-zero ID. If the interface belongs to process 0, skip this step.
- Run stp no-agreement-check
The common rapid transition mechanism is configured.
- Run commit
The configuration is committed.