Alcatel OS-LS-6224 User Manual page 216

3
Configuring the Switch
untagged and tagged BPDU packets are flooded, and are subject to ingress and
egress VLAN rules. Bridging BPDU can only be enabled if the spanning tree
protocol is enabled on port groups.
• Path Cost Default Values — Specifies the method used to assign default path
cost to STP ports. The possible field values are:
• Short — Specifies 1 through 65,535 range for port path cost. This is the default
value.
• Long — Specifies 1 through 200,000,000 range for port path cost. The default
path cost assigned to an interface varies according to the selected method
(Hello Time, Max Age, or Forward Delay).
• Priority — Specifies the bridge priority value. When switches or bridges are
running STP, each is assigned a priority. After exchanging BPDUs, the device with
the lowest priority value becomes the Root Bridge. The default value is 32768. The
port priority value is provided in increments of 4096.
• Hello Time — Specifies the device Hello Time. The Hello Time indicates the
amount of time in seconds a Root Bridge waits between configuration messages.
The default is 2 seconds.
• Max Age — Specifies the device Maximum Age Time. The Maximum Age Time is
the amount of time in seconds a bridge waits before sending configuration
messages. The default Maximum Age Time is 20 seconds.
• Forward Delay — Specifies the device Forward Delay Time. The Forward Delay
Time is the amount of time in seconds a bridge remains in a listening and learning
state before forwarding packets. The default is 10 seconds.
• Bridge ID — Identifies the Bridge priority and MAC address.
• Root Bridge ID — Identifies the Root Bridge priority and MAC address.
• Root Port — Indicates the port number that offers the lowest cost path from this
bridge to the Root Bridge. This field is significant when the bridge is not the Root
Bridge. The default is zero.
• Root Path Cost — The cost of the path from this bridge to the Root Bridge.
• Topology Changes Counts — Specifies the total amount of STP state changes
that have occurred.
• Last Topology Change — Indicates the amount of time that has elapsed since the
bridge was initialized or reset, and the last topographic change that occurred. The
time is displayed in a day-hour-minute-second format, such as 2 days 5 hours 10
minutes and 4 seconds.
Note:
The current root port and current root cost display as zero when this device is not
connected to the network.
Web – Click Layer 2, Spanning Tree, STP, General.
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