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4 Web-based Switch Configuration
port normally should not receive BPDU packets. If a BPDU packet is received, it automatically loses edge
port status. Selecting the False parameter indicates that the port does not have edge port status. Selecting
the Auto parameter indicates that the port have edge port status or not have edge port status automatically.
Priority: Specify the priority of each port. Selectable range is from 0 to 240, and the default setting is 128.
The lower the number, the greater the probability the port will be chosen as a root port.
P2P: Choosing the True parameter indicates a point-to-point (P2P) shared link. P2P ports are similar to edge
ports, however they are restricted in that a P2P port must operate in full-duplex.
Like edge ports, P2P ports transition to a forwarding state rapidly thus benefiting from RSTP. A p2p value of
false indicates that the port cannot have p2p status. Auto allows the port to have p2p status whenever
possible and operate as if the p2p status were true. If the port cannot maintain this status, (for example if the
port is forced to half-duplex operation) the p2p status changes to operate as if the p2p value were False. The
default setting for this parameter is Auto.
Restricted Role: Toggle between True and False to set the restricted role state of the packet. If set to True,
the port will never be selected to be the Root port. The default value is False.
Restricted TCN: Toggle between True and False to set the restricted TCN of the packet. Topology Change
Notification (TCN) is a BPDU that a bridge sends out to its root port to signal a topology change. If set to
True, it stops the port from propagating received TCN and to other ports. The default value is False.
Forwarding BPDU: Bridges use Bridge Protocol Data Units (BPDU) to provide spanning tree information.
STP BPDUs filtering is useful when a bridge interconnects two regions; each region needing a separate
spanning tree. BPDU filtering functions only when STP is disabled either globally or on a single interface.
The possible field values are:
Disabled – BPDU filtering is enabled on the port.
Enabled – BPDU forwarding is enabled on the port (if STP is disabled).
Hello Time: The interval between two transmissions of BPDU packets sent by the Root Bridge to indicate to
all other switches that it is indeed the Root Bridge. The default value is 2.
Click Apply to make the configurations take effect.
Click Refresh to renew the page.
Configuration > Spanning Tree > MST Configuration Identification
The MST Configuration Identification page allows user to configure a MSTI instance on the switch. These
settings will uniquely identify a multiple spanning tree instance set on the switch. The Switch initially
possesses one CI ST or Common Internal Spanning Tree of which the user may modify the parameters for but
cannot change the MSTI ID for, and cannot be deleted.
Figure 4.87 - Configuration > Spanning Tree > MST Configuration Identification
MST Configuration Identification Settings:
Configuration Name: A previously configured name set on the Switch to uniquely identify the MSTI (Multiple
Spanning Tree Instance). If a configuration name is not set, this field will show the MAC address to the
device running MSTP. This field can be set in the STP Bridge Global Set-tings window.
Revision Level: This value, along with the Configuration Name will identify the MSTP region configured on
the Switch. The user may choose a value between 0 and 65535 with a default setting of
D-Link DGS-2000 Series Ethernet Switch User Manual
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