Planet VC-820M User Manual page 111

Priority
Hello Time
Maximum Age Timer
Forward Delay Timer
The following are the user-configurable STP parameters for the port or port group level:
Variable
Port Priority
Port Cost
Default Spanning-Tree Configuration
The Hello Time cannot be longer than the Max. Age. Otherwise, a configuration error will
occur.
A relative priority for each switch – lower
numbers give a higher priority and a greater
chance of a given switch being elected as
the root bridge.
The length of time between broadcasts of
the hello message by the switch.
Measures the age of a received BPDU for a
port and ensures that the BPDU is discarded
when its age exceeds the value of the
maximum age timer.
The amount time spent by a port in the
learning and listening states waiting for a
BPDU that may return the port to the
blocking state.
Description
A relative priority for each
port –lower numbers give a higher priority
and a greater chance of a given port being
elected as the root port.
A value used by STP to evaluate paths –
STP calculates path costs and selects the
path with the minimum cost as the active
path.
Feature
Enable state
Port priority
Port cost
Bridge Priority
Default Value
128
200,000-100Mbps Fast Ethernet ports
20,000-1000Mbps Gigabit Ethernet ports
0 - Auto
Default Value
STP disabled for all ports
128
0
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