Stu Setup - RACOM RAy3 User Manual

Configuration

5.5.4.2. STU setup

The STU (Spanning Tree Unit) is related to VLAN functionality (pages STU, VTU and VLAN has to
correspond to each other). The per VLAN STU in the device supports user commands to access and
modify the contents of the Port State database.
Fig. 5.32: Menu Switch settings / Advanced / STU
• SID
VTU 802.1s (MSTP) Port State Information Database number. This parameter indicates the SID
number that is associated with the 802.1s "Port state" parameter.
It is essential to define the SID to be able to create records in the VTU (VLAN Table).
• Label
A custom string label for a STU entry.
• Port state (for ports Eth1, Eth2, CPU and Air)
This parameter is used to support 802.1s per VLAN spanning tree. Port states are valid for frames
with a VID that is associated to this SID:
○ disabled — Use non-VLAN Port States (i.e., the port's default Port State) for this port.
○ blocking/listening
○ learning
○ forwarding
This "Eth port state" takes precedence over the port's Port State bits unless the port's Port State
(driven by STP) is Disabled (which prevents all frames from flowing).
• Add entry
Creates a new STU database entry. New window is opened to allow to enter values to each field
(see their meanings above). The 'Primary key icon'
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indicates which parameter field is taken as the
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