SMC Networks SMC6724L3 manual Root Device Configuration

SPANNING TREE ALGORITHM CONFIGURATION

device with the lowest MAC address will then become the root device. (Note that lower numeric values indicate higher priority.)

Default: 32768

Range: 0-61440, in steps of 4096

Options: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344, 61440

Root Device Configuration

•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 mean “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) this device will wait before changing states (i.e., discarding 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 discarding 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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