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Any configuration changes made locally on the switch won't be synchronized with Sophos Central. We recommend making changes from the Sophos Central control panel instead.

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https://docs.sophos.com/nsg/switch/help/en-us/index.html?contextId=user-guide-features-configure-STP-rstp-port-settings

RSTP port settings

Configure per port settings when RSTP is turned on in global settings. To configure a port, do as follows:

  1. Select the checkbox of the port you want to configure.
  2. Click Edit.

  3. Configure the following port settings:

    Option Description
    Priority Setup the priority to define the root bridge of the switch. The priority number must be a multiple of 4096.
    Path cost ( 0 is Auto) The path cost setting specifies the relative cost of sending spanning-tree traffic through the interface to adjacent bridges within a spanning-tree region.
    Edge port configuration/operation

    Select Yes to set the port as an edge port.

    When the topology changes, the edge port can change its state directly from blocking to forwarding. For quick generation of the spanning tree, it’s recommended to set the ports connected to the end devices as edge ports.
    P2P MAC configuration/operation

    Select the status of the P2P (Point-to-Point) link to which the ports are connected. When the spanning tree is regenerated, if the port of the P2P link is elected as the root port or the designated port, it can directly change its state to forwarding.

    Three options are supported: Auto, Yes, and No. The default is No

    Auto: The switch automatically checks if the port is connected to a P2P link and then sets the status as open or closed.

    Yes: A port is set as the one connected to a P2P link. You should check the link first.

    No: A port is set as the one that isn’t connected to a P2P link. You should check the link first.
    Migration start time Select Turned on or Turned off to turn migration start time on or off.
    Port status Select On Or Off to turn the port on or off.
    BPDU guard Select Turned on or Turned off to turn BPDU guard on or off.
    Root guard Select Turned on or Turned off to turn root guard on or off.
    BPDU forward Select Turned on or Turned off to turn BPDU forwarding on or off.