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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-VLAN-settings-802.1Q

802.1Q

Each VLAN in a network has an associated VLAN ID, which appears in the IEEE 802.1Q tag in the layer 2 header of packets transmitted on a VLAN. The IEEE 802.1Q specification establishes a standard method for tagging ethernet frames with VLAN membership information. The key for IEEE 802.1Q to perform its functions is in its tags. 802.1Q compliant switch ports can be configured to transmit tagged or untagged frames. A tag field containing VLAN information can be inserted into an ethernet frame. When using 802.1Q VLAN configuration, you configure ports to be a part of a VLAN group. When a port receives data tagged for a VLAN group, the data is discarded unless the port is a member of the VLAN group.

Option Description
Enabled Enables 802.1Q VLANs. This feature is turned on by default.
VID Displays the VLAN ID for which the network policy is defined. The range of the VLAN ID is from 1 to 4094.
Name Enter the VLAN name. You can use up to 32 alphanumeric characters.
Tagged Port Frames transmitted from this port are tagged with the VLAN ID.
Untagged Port Frames transmitted from this port are untagged.

Tip

The switch's default setting assigns all ports to a single 802.1Q VLAN (VID 1). Please keep this in mind when configuring the VLAN settings for the switch.