SMC Networks SMC6824M manual 162, Root Device Configuration

CONFIGURING THE SWITCH

-RSTP: Rapid Spanning Tree (IEEE 802.1w) RSTP is the default.

-MSTP: Multiple Spanning Tree (IEEE 802.1s)

•Default Priority Format – Sets the default spanning tree priority format:

-802.1D9: Specifies IEEE 802.1D priority format in increments of 1.

-802.1t: Specifies IEEE 802.1t format in increments of 4096.

•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 1 (802.1D format) or step of 4096 (802.1t format)

-Options (802.1t): 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 this 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)]

9.IEEE 802.1D priority format cannot be used for a switch that is a member of an MIST. If you select 802.1D priority format for a bridge in this state, the system will return an error message.

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