SMC Networks SMC6224M manual 133, Root Device Configuration

SPANNING TREE ALGORITHM CONFIGURATION

•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. (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)]

3-133