between switch B and C is deliberately chosen as a 100 Mbps Fast Ethernet link (default port cost = 19). Gigabit ports could be used, but the port cost should be increased from the default to ensure that the link between switch B and switch C is the blocked link.

4.6.2 Spanning Tree Configuration

The Spanning Tree Protocol (STP) operates on two levels: On the switch level, the settings are globally implemented. On the port level, the settings are implemented on a. per user-defined Group of ports.

1. Spanning Tree Configuration

The “Rapid Spanning Tree Bridge Configure” table allows configuring the spanning tree parameters. Rapid Spanning Tree Status: The spanning tree function of the switch is default disabled. This field enables to turn on the spanning tree on the switch.

Force Protocol Version: 0 for IEEE 802.1D Spanning Tree, 2 for IEEE 802.1W Rapid Spanning Tree

Max Age: (6 - 40 sec) the default setting is 20

Hello Time: (1 - 10sec) the default setting is 2

Forward Delay: (4 -30 sec) the default setting is 15

Bridge Priority: (0 - 61440) the default setting is 32768

2. Bridge Information

The informations of the STP Root show in the Bridge Information table.

3. STP Port Configuration

The following fields can be set for STP port configuration:

Port Priority: Defines if this port is more or less likely to become the root port. The range is from 0 to 255,