Management Guide - Kamery IP

3Configuring the SwitchThe following interface attributes can be configured:• Spanning Tree – Enables/disables STA on this interface. (Default: Enabled).• BPDU Flooding - Enables/disables the flooding of BPDUs to other ports whenglobal spanning tree is disabled (page 3-200) or when spanning tree is disabled onspecific port. When flooding is enabled, BPDUs are flooded to all other ports on theswitch or to all other ports within the receiving port’s native VLAN as specified bythe Spanning Tree BPDU Flooding attribute (page 3-200).• Priority – Defines the priority used for this port in the Spanning Tree Protocol. Ifthe 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. Thismakes a port with higher priority less likely to be blocked if the Spanning TreeProtocol is detecting network loops. Where more than one port is assigned thehighest 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 pathbetween devices. Therefore, lower values should be assigned to ports attached tofaster media, and higher values assigned to ports with slower media. (Path costtakes precedence over port priority.)(Range: 0 for auto-configuration, 1-65535 for the short path cost method 12 ,1-200,000,000 for the long path cost method)By default, the system automatically detects the speed and duplex mode used oneach port, and configures the path cost according to the values shown below. Pathcost “0” is used to indicate auto-configuration mode. When the short path costmethod is selected and the default path cost recommended by the IEEE 8021wstandard exceeds 65,535, the default is set to 65,535.Table 3-12 Recommended STA Path Cost RangePort Type IEEE 802.1D-1998 IEEE 802.1w-2001Ethernet 50-600 200,000-20,000,000Fast Ethernet 10-60 20,000-2,000,000Gigabit Ethernet 3-10 2,000-200,000Table 3-13 Recommended STA Path CostsPort Type Link Type IEEE 802.1D-1998 IEEE 802.1w-2001EthernetHalf Duplex 1002,000,000Full Duplex 951,999,999Trunk901,000,00012. Refer to “Configuring Global Settings for STA” on page 3-200 for information on setting the pathcost method.3-208