Cisco 6504-E User Guide - Page 350

C6576M EtherChannel Dialog Box Chapter 6 Logical Object Dialog Boxes - root - none • PortFast Enabled-Indicates whether or not an interface is enabled to move directly to the forwarding state on link up. This is a read-only attribute. Portfast can be configured on a trunking interface, but it only has an effect when the interface is in access mode. The following are possible values: - true - false 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. Note On a Hybrid OS device, the port cost cannot be configured directly. The actual port cost used is a calculated value and is the one being displayed. 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 switch port 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] 6-60 Cisco 6500/7600 Series Manager User Guide