Wavetronix Click 342 (lean managed ethernet switch) (CLK-342) - Managed Switches User Guide - Manual (Page 63)

62 CHAPTER 6 • RAPID SPANNING TREE
Figure 6.10 – Specifying the Root Switch Priority
The root port and designated port are always the ports with the lowest path costs. If the
costs are the same, the priority is the decisive criterion. If the priorities are also the same,
the port number is the decisive criterion. Specify an appropriate combination of costs and
priority on the “STP Port Configuration” page in WBM for the port specified as the root
port or designated port. Make sure that all the other network switches either have higher
costs or a lower priority (higher value).
One of the following requirements must be met so that the Spanning Tree Protocol can be
disabled for a port:
˽ A termination device is connected to the port.
˽ Additional infrastructure components are connected to the port. The corresponding
network segment does not contain any loops.
˽ Additional infrastructure components are connected to the port, forming a Spanning
Tree of their own. No additional redundant connections to this network segment are
permitted.
Modifying the Protocol Timer
It may be necessary to modify the protocol timer if, e.g., there are more than ten active
Spanning Tree components in a single network. You can also attempt to reduce the recon-
figuration times by modifying the timer. However, care should be taken in order to prevent
unstable networks. Please note that the protocol times are specified by the root switch and
that they are distributed to all devices via BPDU. It is therefore only necessary to modify
the values in the root switch. If the root switch fails, the timer values of another active STP