SMC Networks SMC7724M/VSW manual Configuring the Switch

CONFIGURING THE SWITCH

•Priority – Bridge priority is used in selecting the root device, root port, and designated port. The device with the highest priority becomes the STA root device. However, if all devices have the same priority, the device with the lowest MAC address will then become the root device.

•Default: 32768

•Range: 0 - 65535

•Hello Time – Interval (in seconds) at which the root device transmits a configuration message.

•Default: 2

•Minimum: 1

•Maximum: The lower of 10 or [(Max. Message Age / 2) -1]

•Maximum Age – The maximum time (in seconds) a device can wait without receiving a configuration message before attempting to reconfigure. All device ports (except for designated ports) should receive configuration messages at regular intervals. Any port that ages out STA information (provided in the last configuration message) becomes the designated port for the attached LAN. If it is a root port, a new root port is selected from among the device ports attached to the network. (References to “ports” in this section means “interfaces,” which includes both ports and trunks.)

•Default: 20

•Minimum: The higher of 6 or [2 x (Hello Time + 1)]

•Maximum: The lower of 40 or [2 x (Forward Delay - 1)]

•Forward Delay – The maximum time (in seconds) the root device will wait before changing states (i.e., listening to learning to forwarding.) This delay is required because every device must receive information about topology changes before it starts to forward frames. In addition, each port needs time to listen for conflicting information that would make it return to a blocking state; otherwise, temporary data loops might result.

•Default: 15

•Minimum: The higher of 4 or [(Max. Message Age / 2) + 1]

•Maximum: 30

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