GE ML1200 instruction manual 13-15

CHAPTER 13: RAPID SPANNING TREE PROTOCOL RAPID SPANNING TREE PROTOCOL

13.3 Configuring STP/RSTP with EnerVista Secure Web Management software

13.3.1 Normal RSTP

To setup and configure RSTP, select the Configure > RSTP menu items. In setting up RSTP or STP, it is advised that the system defaults are used for weights and other parameters. Only when specific ports are required to be the active link should the default values change.

In the window below, RSTP or STP is disabled. The designated root is set to zero as RSTP is disabled.

The RSTP bridge configuration parameters are defined below.

•Designated Root: Shows the MAC address of the bridge in the network elected or designated as the root bridge. Normally, when STP is not enabled, the switch designates itself as the root switch.

•Root Path Cost: A path cost is assigned to individual ports for the switch to determine which ports are the forwarding points. A higher cost means more loops; a lower cost fewer loops. More loops equal more traffic and a tree which takes a long time to converge, resulting in a slower system

•Root Port: Indicates the port number, which is elected as the root port of the switch. A root port of "0" indicates STP is disabled.

•Protocol: Indicates whether STP or RSTP is being used. It also indicates if RSTP is used in Smart RSTP (ring-only mode) or normal mode.

•Bridge ID: Indicates the MAC address of the current bridge over which traffic will flow.

•Bridge Priority: Specifies the switch (bridge) priority value. This value is used along with the switch MAC address to determine which switch in the network is the root device. Lower values mean higher priority. The value ranges from 0 to 65535, with a default of 32768

MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL 13–15