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DGS-3024 Gigabit Ethernet Switch Manual
MSTI Settings
This window displays the current MSTI configuration settings and can be used to update the port configuration for an MSTI
ID. If a loop occurs, the MSTP function will use the port priority to select an interface to put into the forwarding state. Set a
higher priority value for interfaces to be selected for forwarding first. In instances where the priority value is identical, the
MSTP function will implement the lowest port number into the forwarding state and other interfaces will be blocked.
Remember that lower priority values mean higher priorities for forwarding packets.
To view the following window, click Configuration > Spanning Tree > MSTI Settings:
Figure 7- 20. MSTI Port Information window
To view the MSTI settings for a particular port, select the Port number, located in the top left hand corner of the window and
click Apply. To modify the settings for a particular MSTI Instance, click on its hyperlinked MSTI ID, which will reveal the
following window.
Figure 7- 21. MSTI Settings window
Parameter Description
Instance ID
Displays the MSTI ID of the instance being configured. An entry of 0 in this field denotes
the CIST (default MSTI).
Internal cost
This parameter is set to represent the relative cost of forwarding packets to specified
ports when an interface is selected within a STP instance. The default setting is 0 (auto).
There are two options:
0 (auto) - Selecting this parameter for the internalCost will set quickest route
automatically and optimally for an interface. The default value is derived from
the media speed of the interface.
value 1-2000000 - Selecting this parameter with a value in the range of 1-2000000
will set the quickest route when a loop occurs. A lower Internal cost represents
a quicker transmission.
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