User's Manual

User’s Manual of SGS-5240 Series Managed Switch
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 Interface – Displays a list of ports or groups.
 Spanning Tree – Enables/disables STA on this interface.
(Default: Enabled)
 BPDU Flooding - Enables/disables the flooding of BPDUs to other ports when global spanning tree is disabled or when
spanning tree is disabled on a specific port. When flooding is enabled, BPDUs are flooded to all other ports on the switch
or to all other ports within the receiving port’s native VLAN as specified by the Spanning Tree BPDU Flooding attribute .
(Default: Enabled)
 Priority – Defines the priority used for this port in the Spanning Tree Protocol. If the path cost for all ports on a switch are
the same, the port with the highest priority (i.e., lowest value) will be configured as an active link in the Spanning Tree.
This makes a port with higher priority less likely to be blocked if the Spanning Tree Protocol is detecting network loops.
Where more than one port is assigned the highest priority, the port with lowest numeric identifier will be enabled.
 Default: 128
 Range: 0-240, in steps of 16
 Admin Path Cost – This parameter is used by the STA to determine the best path between devices. Therefore, lower
values should be assigned to ports attached to faster media, and higher values assigned to ports with slower media. Note
that path cost takes precedence over port priority. (Range: 0 for auto-configuration, 1-65535 for the short path cost
method
5, 1-200,000,000 for the long path cost method)
By default, the system automatically detects the speed and duplex mode used on each port, and configures the path cost
according to the values shown below. Path cost “0” is used to indicate auto-configuration mode. When the short path cost
method is selected and the default path cost recommended by the IEEE 8021w standard exceeds 65,535, the default is set to
65,535.