Setting Parameters for Interworking Between a Huawei Datacom Device and a Non-Huawei Device

The switch supports the following modes on the Proposal/Agreement mechanism:

• Enhanced mode: The port participates in calculation of the root port when calculating the synchronization flag bit.

  1. An upstream device sends a Proposal message to a downstream device, requesting fast 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.

  2. 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.

  3. The downstream device sends an Agreement message to the upstream device. After receiving the Agreement 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 port ignores the root port when calculating the synchronization flag bit.

  1. An upstream device sends a Proposal message to a downstream device, requesting fast transition. After receiving the Proposal 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.

  2. The downstream device sends an Agreement message to the upstream device. After receiving the Agreement 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.

On a network running VBST protocol, a Huawei datacom device and the connected non-Huawei device may fail to communicate if they use different Proposal/Agreement modes. The Huawei datacom device can select the same mode as that on the non-Huawei device to implement interworking.

If Huawei datacom device and Handreamnet switch are deployed on the VBST network, non-standard STP/RSTP packets sent by the Handreamnet switch may cause temporary loops. Therefore, the Huawei datacom device interface needs to be configured to discard non-standard STP/RSTP packets to prevent temporary loops.

Pre-configuration Tasks

Before setting parameters for interworking between a Huawei datacom device and a non-Huawei device, perform the task of Configuring Basic VBST Functions.