Reference Guide

N8406-022A 1Gb Intelligent L2 Switch Browser-based Interface Reference Guide 25
The following table describes the Switch Spanning Tree Group Information controls:
Table 11 Switch Spanning Tree Group Information controls
Control
Description
Spanning Tree State
Shows if Spanning Tree is turned on or off for the switch.
VLANs
Displays the VLANs that are members of this Spanning Tree Group.
Current Root
Displays information about the root bridge for the Spanning Tree. Information includes
the priority (hex) and MAC address of the root.
Path Cost
Displays the cumulative path cost to the Current Root.
Root Port
Displays the switch port that is connected to the Current Root.
Max Age
Specifies, in seconds, the maximum time the bridge waits without receiving a
configuration bridge protocol data unit before it reconfigures the STP network.
Hello Time
Specifies, in seconds, how often the root bridge transmits a configuration bridge
protocol data unit (BPDU). Any bridge that is not the root bridge uses the root bridge
hello value.
Forward Delay
Specifies, in seconds, the amount of time that a bridge port has to wait before it
changes from learning state to forwarding state.
Hold Time
Displays the minimum number of seconds that must elapse between transmissions of
consecutive configuration BPDUs on a port.
Topology Change Counts
Displays the number of times the spanning tree topology has changed.
Aging Time
Specifies, in seconds, the amount of time the bridge waits without receiving a packet
from a station before removing the station from the Forwarding Database.
Bridge Priority
Controls which bridge on the network will become the STP root bridge.
Bridge Hello Time
Specifies, in seconds, how often the root bridge transmits a configuration bridge
protocol data unit (BPDU). Any bridge that is not the root bridge uses the root bridge
hello value.
Bridge Max Age
Specifies, in seconds, the maximum time the bridge waits without receiving a
configuration bridge protocol data unit before it reconfigures the STP network.
Bridge Forward Delay
Specifies, in seconds, the amount of time that a bridge port has to wait before it
changes from learning state to forwarding state.
Bridge Aging Time
Specifies, in seconds, the amount of time the bridge waits without receiving a packet
from a station before removing the station from the Forwarding Database.
Switch Spanning Tree Port Information
The following table describes the STP port parameters:
Table 12 Switch Spanning Tree Port Information controls
Control
Description
Port
Displays the port number for each port‟s STP information.
Spanning Tree State
Shows if Spanning Tree is turned on or off for the port.
Port State
Shows the current state of the port. The state field can be blocking, listening,
learning, forwarding, or disabled.
The State field in RSTP or MSTP mode can be one of the following: Discarding
(DISC), Learning (LRN), Forwarding (FWD), or Disabled (DSB).
Port Priority
Helps determine which bridge port becomes the designated port. In a network topology
that has multiple bridge ports connected to a single segment, the port with the lowest port
priority becomes the designated port for the segment.
Port Cost
Helps determine the designated port for a segment. Generally speaking, the faster the
port, the lower the path cost. A setting of 0 indicates that the cost will be set to the
appropriate default after the link speed has been auto negotiated.
Designated Bridge
Shows information about the bridge connected to each port, if applicable. Information
includes the priority (hex) and MAC address of the Designated Bridge.
Designated Port
Displays the port ID of the port on the Designated Bridge to which this port is connected.