Ericsson ECN330, Руководство пользователя

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Configuring the ECN330-switch
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1553-KDU 137 365 Uen D 2006-06-16
• Root Port – The number of the port on the ECN330-switch that is
closest to the root. The ECN330-switch communicates with the root
device through this port. If there is no root port, then the ECN330-
switch has been accepted as the root device of the Spanning Tree
network.
• Root Path Cost – The path cost from the root port on the ECN330-
switch to the root device.
• Configuration Changes – The number of times the Spanning Tree has
been reconfigured.
• Last Topology Change – Time since the Spanning Tree was last
reconfigured.
These additional parameters are only displayed for the CLI:
• Spanning tree mode – Specifies the type of spanning tree used on the
ECN330-switch:
• STP: Spanning Tree Protocol (IEEE 802.1D)
• RSTP: Rapid Spanning Tree (IEEE 802.1w)
• MSTP: Multiple Spanning Tree (IEEE 802.1s)
• Instance – Instance identifier of this spanning tree. (This is always 0 for
the CIST.)
• VLANs configuration – VLANs assigned to the CIST.
• 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.
• Root Hello Time – Interval (in seconds) at which this device transmits
a configuration message.
• Root Maximum Age – The maximum time (in seconds) this 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. If the root port ages
out STA information (provided in the last configuration message), 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.)