SH-E514TR1 10 Gigabit Ethernet SmartPro Switch User Manual
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Figure 9-13 STP Global Settings
The fields that can be configured are described below:
STP State:
Enable or disable the STP global state here.
STP New Root Trap:
Enable or disable the STP new root trap option here.
STP Topology Change Trap:
Enable or disable the STP topology change trap option here.
STP Mode:
Select the STP mode used here. Options to choose from are
RSTP
and
STP
.
Priority:
Select the STP priority value here. This value is between 0 and 61440. By default, this value is 32768. The
lower the value, the higher the priority.
Bridge Max Age:
Enter the br
idge’s maximum age value here. This value must be between 6 and 40 seconds. By
default, this value is 20 seconds. The maximum age value may be set to ensure that old information does not
endlessly circulate through redundant paths in the network, preventing the effective propagation of the new
information. Set by the Root Bridge, this value will aid in determining that the Switch has spanning tree configuration
values consistent with other devices on the bridged LAN.
Bridge Hello Time:
Enter the bridge’s hello time value here. This value must be between 1 and 2 seconds. By default,
this value is 2 seconds. This is the interval between two transmissions of BPDU packets sent by the Root Bridge to tell
all other switches that it is indeed the Root Bridge.
Bridge Forward Time:
Enter the bridge’s forwarding time value here. This value must be between 4 and 30 seconds.
By default, this value is 15 seconds. Any port on the Switch spends this time in the listening state while moving from
the blocking state to the forwarding state.
TX Hold Count:
Enter the transmit hold count value here. This value must be between 1 and 10 times. By default, this
value is 6 times. This value is used to set the maximum number of Hello packets transmitted per interval.
Click
Apply
to accept the changes made for each individual section.
STP Port Settings
This window allows the user to configure STP parameters for individual ports or a range of ports. In addition to setting
Spanning Tree parameters for use on the switch level, the Switch allows for the configuration of the groups of ports,
each port-group of which will have its own spanning tree, and will require some of its own configuration settings.
An STP Group spanning tree works in the same way as the switch-level spanning tree, but the root bridge concept is
replaced with a root port concept. A root port is a port of the group that is elected based on port priority and port cost,
to be the connection to the network for the group. Redundant links will be blocked, just as redundant links are blocked
on the switch level.
The STP on the switch level blocks redundant links between switches (and similar network devices). The port level
STP will block redundant links within an STP Group.
It is recommended to define an STP Group to correspond to a VLAN group of ports.
