How can I configure an MSTP region on an S series switch


For S (except the S1700) series switches, an MSTP region is configured in the stp region-configuration view. Switches in the same MSTP region share the same MSTP region configuration. A switch is deleted from the region if the MSTP region setting of the switch is changed.
The following parameters can be set for an MSTP region:
1. Format selector: The default value is 0 and cannot be set through the command.
2. Region name: It is the bridge MAC address by default.
3. Revision level: The default value is 0.
4. Instance/Vlans Mapped: Mapping between instances and VLANs. By default, all VLANs are mapped to instance 0.

Other related questions:
What is the maximum number of VLANs supported by an MSTP instance on an S series switch
For S (except the S1700) series switches, an MSTP instance supports up to 4094 VLANs.

How do I configure MSTP and VRRP on an S series switch
An S series switch (except the S1700) connected to user terminals cannot forward VRRP packets (because discarding unknown multicast packets is configured, for example), or the links that VRRP packets (heartbeat packets) pass through are faulty or unstable. To address such problems, configure a heartbeat line between two switches to transmit VRRP packets. Loops may occur between the two switches after the heartbeat line is configured. Therefore, you need to configure a loop prevention protocol such as STP or MSTP to prevent loops. For details on how to configure VRRP and MSTP, see topic Example for Configuring MSTP and VRRP in section "Typical Examples of MSTP/RRPP/SEP/VBST" at S1720&S2700&S3700&S5700&S6700&S7700&S9700 Typical Configuration Examples. The configuration method for the S9300 is the same as that for other switch models. When configuring VRRP on a switch separately, STP does not need to be disabled.

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