Configures the operational mode for the specified STP (Spanning Tree Protocol) domain.
| stpd_name | Specifies an STPD (Spanning Tree Domain) name on the switch. |
| dot1d | Specifies the STPD mode of operation to be 802.1D. |
| dot1w | Specifies the STPD mode of operation to be 802.1w, and rapid configuration is enabled. |
| mstp | Specifies the STPD mode of operation to be 802.1s, and rapid configuration is enabled. |
| cist | Configures the specified STPD as the common instance spanning tree for the MSTP (Multiple Spanning Tree Protocol) region. |
| msti | Configures the specified STPD as a multiple spanning tree instance for the MSTP region. |
| instance | Specifies the Id of the multiple spanning tree instance. The range is 1 to 4,094. |
The STPD s0 by default operates in MSTP CIST mode.
User-created STPDs operate by default in dot1d mode.
If your STPD has the same name as another component, for example a VLAN (Virtual LAN), we recommend that you specify the identifying keyword as well as the name. If your STPD has a name unique only to that STPD, the keyword stpd is optional.
If you configure the STP domain in 802.1D mode, the rapid reconfiguration mechanism is disabled.
If you configure the STP domain in 802.1w mode, the rapid reconfiguration mechanism is enabled. You enable or disable RSTP on a per STPD basis only. You do not enable RSTP on a per port basis.
If you configure the STP domain in MSTP mode, the rapid reconfiguration mechanism is enabled. You enable or disable MSTP on a per STPD basis only. You do not enable MSTP on a per port basis. MSTP STPDs use 802.1D BPDU encapsulation mode by default. To ensure correct operation of your MSTP STPDs, do not configure EMISTP or PVST+ encapsulation mode for MSTP STPDs.
You must first configure a Common and Internal Spanning Tree (CIST) before configuring any multiple spanning tree instances (MSTIs) in the region. You cannot delete or disable a CIST if any of the MSTIs are active in the system.
STP operational mode can be changed while VLANs are associated with an STP domain. In MSTP mode, mode change is allowed only for CIST domains.
The following command configures STPD s1 to enable the rapid reconfiguration mechanism and operate in 802.1w mode:
configure stpd s1 mode dot1w
The following command configures STPD s2 to operate as an MSTI (Multiple Spanning Tree Instances) in an MSTP domain:
configure stpd s2 mode mstp msti 3
This command was first available in ExtremeXOS 10.1.
The mstp parameter was added in ExtremeXOS 11.4.
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