Siemens SIMATIC NET SCALANCE W760 Series Configuration Manual page 205

Display in client mode
Description
The page contains the following boxes:
● "Bridge Priority" / "Root Priority" input box
The Bridge priority decides which device becomes the root bridge. The Bridge with the
highest priority becomes the root bridge. The lower the value, the higher the priority. If
several devices in a network have the same priority, the device whose MAC address has
the lowest numeric value will become the root bridge. Both parameters, bridge priority
and MAC address together form the bridge identifier. Since the root bridge manages all
path changes, it should be located as centrally as possible due to the delay of the frames.
The value for the bridge priority is a whole multiple of 4096 with a range of values from 0
to 61440.
● Bridge Adresse / Root Adresse
The bridge address shows the MAC address of the device and the root address shows
the MAC address of the root bridge.
● Root Port
Shows the port via which the switch communicates with the root bridge.
● Root Cost
The path costs from this device to the root bridge.
● Topologie Changes / Last Topology Change
The entry for the device shows the number of reconfiguration actions due to the spanning
tree mechanism since the last startup. For the root bridge, the time since the last
reconfiguration is displayed as follows:
– Seconds: sec unit after the number
– Minutes: min unit after the number
– Hour: hr unit after the number
● "Bridge Hello Time [s]" / "Root Hello Time [s]" input box
Each bridge regularly sends configuration frames (BPDUs). The interval between two
such frames is the Hello time. The default for this parameter is 2 seconds.
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03
Configuring with Web Based Management
5.7 "Layer 2" menu
205