xStack DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
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Priority (0-61440)
Select a value between
0
and
61440
to specify the priority for a specified MSTI for forwarding
packets. The lower the value, the higher the priority. This entry must be divisible by 4094 and
can only be utilized if the Type chosen is Set Priority Only.
Click
Apply
to implement changes made.
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 MAC address 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 > MSTP Settings
:
Figure 6- 27. MSTP 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 screen 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 6- 28. 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
(0=Auto)
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.
Priority
Enter a value between
0
and
240
to set the priority for the port interface. A higher priority will
designate the interface to forward packets first. A lower number denotes a higher priority.
Click
Apply
to implement changes made.
