User’s Manual of GS-4210-16T2S_24T2S_16P2S_24P2S_48T4S
4.6.7 MST Port Setting
This page allows the user to inspect the current STP MSTI port configurations, and possibly change them as well.
A MSTI port is a virtual port, which is instantiated separately for each active CIST (physical) port for each MSTI instance
configured and applicable for the port. The MSTI instance must be selected before displaying actual MSTI port configuration
options.
This page contains MSTI port settings for physical and aggregated ports. The aggregation settings are global. The MSTI Ports
Setting screens in Figure 4-6-16 and Figure 4-6-17 appear.
Figure 4-6-16: MST Port Configuration Page Screenshot
The page includes the following fields:
Object Description
• MST ID
Enter the special MST ID to configure path cost & priority.
• Port Select
Select port number for this drop down list.
• Priority
Controls the port priority. This can be used to control priority of ports having
identical port cost.
• Internal Path Cost
(0 = Auto)
Controls the path cost incurred by the port.
The Auto setting will set the path cost as appropriate by the physical link speed,
using the 802.1D recommended values. Using the Specific setting, a
user-defined value can be entered.
The path cost is used when establishing the active topology of the network.
Lower path cost ports are chosen as forwarding ports in favor of higher path cost
ports.
Valid values are in the range 1 to 200000000.
Button
: Click to apply changes.
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