L2 Features > Stp > Stp Port Settings - D-Link DXS-1100 series User Manual

4 Configuration
settings configured for STP are also used for RSTP. This section introduces some new Spanning Tree
concepts and illustrates the main differences between the two protocols.
By default, Spanning Tree Protocol is Disabled. If enabled, the Switch will listen for BPDU packets and its
accompanying Hello packet. BPDU packets are sent even if a BPDU packet was not received. Therefore,
each link between bridges is sensitive to the status of the link. Ultimately this difference results in faster
detection of failed links, and thus faster topology adjustment.
The fields that can be configured are described below:
Spanning Tree 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 bridge'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.
L2 Features > STP > 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.
Figure 4.86 – L2 Functions > STP > STP Global Settings
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D-Link 10 Gigabit Ethernet Switch User Manual