Cisco VS-C6509E-S720-10G User Manual page 153

Chapter 5 Physical Object Dialog Boxes
Access Mode Area
The Access Mode area of the C6576M Ethernet Interface dialog box provides the following information:
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•
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:
•
The VLAN STP instance does not have to be currently carried on the trunk in order to configure the
Note
per-VLAN STP settings. The settings will take effect when the interface actually begins trunking the
VLAN traffic.
•
•
Default values for priority and cost will be used if one of these arguments is not provided by the user.
Note
The user must provide a nondefault value for at least one of these arguments; otherwise, the action will
fail.
•
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.
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 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.
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
C6576M Ethernet Interface Dialog Box
Cisco 6500/7600 Series Manager User Guide
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