Cisco VS-C6509E-S720-10G User Manual page 350

C6576M EtherChannel Dialog Box
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Access Mode Area
The Access Mode area of the C6576M Ethernet Interface dialog box provides the following information:
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Note
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:
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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.
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Cisco 6500/7600 Series Manager User Guide
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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
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)
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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.
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.
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.
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]
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Native IOS 12.1(8a)E and later:Integer (0..252) [increments of 4]
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Chapter 6 Logical Object Dialog Boxes