Cisco 6504-E User Guide - Page 153

Chapter 5 Physical Object Dialog Boxes C6576M Ethernet Interface Dialog Box Access Mode Area The Access Mode area of the C6576M Ethernet Interface dialog box provides the following information: • Port Priority-Describes the STP port priority of this interface. This is a metric used to represent the location of an interface in a network topology. It is used to determine which port will be placed in a blocking state when two or more ports are part of a loop. The default value is 128 in all versions of IOS, 32 in all versions of CatOS. The valid values are: - Native IOS 12.1(6)E and earlier:Integer (0..248) [increments of 8] - Native IOS 12.1(8a)E and later:Integer (0..252) [increments of 4] - CatOS 6.3:Integer(0..63) - CatOS 7.1:Integer(1..63) • Port Cost-Describes the STP port cost for this interface. The port cost is a metric used to represent the speed of the interface. STP will use this value in determining the preferred path when a loop is detected in the network. Per VLAN STP Setting Area The Per VLAN STP Setting area in the STP tab of the C6576M Ethernet Interface dialog box provides the following information: • STP VLAN Table-Describes the STP per-VLAN configurations of a trunking interface. There is one entry for each explicit per-VLAN spanning-tree configuration on the interface. Note The VLAN STP instance does not have to be currently carried on the trunk in order to configure the per-VLAN STP settings. The settings will take effect when the interface actually begins trunking the VLAN traffic. • Priority-Describes the STP VLAN port priority of this interface. The VLAN port priority is used on trunking interfaces. On any switchport that is not in trunking mode, the STP port priority is used instead. The default value is 128 in all versions of IOS, 32 in all versions of CatOS. The valid values are: - Native IOS 12.1(6)E and earlier:Integer (0..248) [increments of 8] - Native IOS 12.1(8a)E and later:Integer (0..252) [increments of 4] - CatOS 6.3:Integer(0..63) - CatOS 7.1:Integer(1..63) • Cost-Describes the STP VLAN path cost of this interface. The VLAN path cost is only used on trunking interfaces. On any switchport that is not in trunking mode, the STP port path cost is used instead. Note Default values for priority and cost will be used if one of these arguments is not provided by the user. The user must provide a nondefault value for at least one of these arguments; otherwise, the action will fail. • Add/Remove Per VLAN STP Setting button-Launches a subdialog box to add and remove an explicit STP VLAN configuration to the interface. The configuration will only have an effect if the interface is in trunking mode and the VLAN has an associated STP instance. The interface does not Cisco 6500/7600 Series Manager User Guide 5-39