D-Link DXS-1100-10TS User Manual - Page 68
L2 Features > STP > STP Port Settings, STP Topology Change Trap
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4 Configuration D-Link 10 Gigabit Ethernet Switch User Manual 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. Figure 4.86 - L2 Functions > STP > STP Global Settings 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. 61