Configuring protected VLANs
Configure the same protected VLAN for all nodes of an ERPS instance. To implement load balancing, configure different protected VLANs for different ERPS instances.
Protected VLANs are configured by referencing MSTIs. The protected VLAN configuration method varies by the spanning tree mode:
In STP, RSTP, or MSTP mode, you must manually configure the mappings between VLANs and MSTIs.
In PVST mode, the device automatically maps each VLAN to an MSTI. When the spanning tree protocol is disabled globally, all VLANs are automatically mapped to MSTI 0.
For more information about MSTI and PVST, see Layer 2—LAN Switching Configuration Guide.
To configure protected VLANs:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter MST region view. | stp region-configuration | This step is not required if the device is operating in PVST mode. For more information about this command, see Layer 2—LAN Switching Command Reference. |
3. Map VLANs to MSTIs. |
| By default, all VLANs are mapped to MSTI 0 (CIST). This step is not required if the device is operating in PVST mode. For more information about these commands, see Layer 2—LAN Switching Command Reference. |
4. Activate the MST region configuration. | active region-configuration | This step is not required if the device is operating in PVST mode. For more information about this command, see Layer 2—LAN Switching Command Reference. |
5. (Optional.) Display the mapping between VLANs and MSTIs. | display stp region-configuration | Available in any view. The output of the command includes VLAN-to-instance mappings. For more information about this command, see Layer 2—LAN Switching Command Reference. |
6. Return to system view. | quit | This step is not required if the device is operating in PVST mode. |
7. Enter ERPS ring view. | erps ring ring-id | N/A |
8. Enable ERPS instance view. | instance instance-id | N/A |
9. Configure the protected VLANs. | protected-vlan reference-instance instance-id-list | By default, an ERPS instance does not have protected VLANs. |