D-Link DES-3552 [65/260] Msti settings

DES-3550 Fast Ethernet Layer 2 Switch

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- 25. 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- 26. MSTI Settings window

Parameter Description

Instance ID <0>

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) <200000>

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 to 2000000 will set the

quickest route when a loop occurs. A lower Internal cost represents a quicker transmission.

Priority <128>

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.