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TRGPS-9084GT-M12X-BP2-MV User
Manual
ORing Industrial Networking Corp
32
MSTI
The bridge instances. CIST is the default instance, which is
always active.
Priority
Indicates bridge priority. The lower the value, the higher the
priority. The bridge priority, MSTI instance number, and the 6-byte
MAC address of the switch forms a bridge identifier.
Save
Click to save changes
Reset
Click to undo any changes made locally and revert to previously
saved values
4.5.3 CIST
With the ability to cross regional boundaries, CIST is used by MSTP to communicate with other
MSTP regions and with any RSTP and STP single-instance spanning trees in the network. Any
boundary port, that is, if it is connected to another region, will automatically belongs solely to
CIST, even if it is assigned to an MSTI. All VLANs that are not members of particular MSTIs
are members of the CIST.
Port Settings
Label
Description
Port
The switch port number to which the following settings will be
applied.
STP Enabled
Check to enable STP for the port
Path Cost
Configures the path cost incurred by the port.
Auto
will set the
path cost according to the physical link speed by using the
802.1D-recommended values.
Specific
allows you to enter a
user-defined value. The path cost is used when establishing an
active topology for the network. Lower path cost ports are chosen