Hirschmann RS20 Reference Manual page 128

Switching 4.5 VLAN
Figure 36: VLAN Static Dialog
Note: When configuring the VLAN, ensure that the management station still
has access to the device after the VLAN configuration is saved.
Connect the management station to a port that is a member of the VLAN that
is selected as the management VLAN. In the state on delivery, the device
transmits the management data in VLAN 1.
Note: The device automatically creates VLANs for MRP rings. The MRP ring
function prevents the deletion of these VLANs.
Note: Note the tagging settings for ports that are part of a redundant Ring or
of the Ring/network coupling.
RM GUI L2E
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Release 8.0 05/2013