GE -DS-242-POE User Manual page 77

NOTE: On the switch level, STP calculates the Bridge Identifier for each switch and
then sets the Root Bridge and the Designated Bridges.
On the port level, STP sets the Root Port and the Designated Ports.
The following are the user-configurable STP parameters for the switch:
PARAMETER DESCRIPTION
A combination of the User-set priority and the
Bridge Identifier (Not switch's MAC address.
user configurable
The Bridge Identifier consists of two parts:
except by setting
priority below) a 16-bit priority and a 48-bit Ethernet MAC address
32768 + MAC.
A relative priority for each switch - lower numbers
Priority 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
Hello Time
message by the switch.
Measures the age of a received BPDU for a port and
Maximum Age Timer 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
Forward Delay Timer listening states waiting for a BPDU that may return
the port to the blocking state.
The following are the user-configurable STP parameters for the port or port group
level:
PARAMETER DESCRIPTION
A relative priority for each switch - lower numbers
Port Priority give a higher priority and a greater chance of a given
switch being elected as the root bridge.
A value used by STP to evaluate paths - STP
Port Cost calculates path costs and selects the path with the
minimum cost as the active path.
GE-DS-242-PoE Managed Ethernet Switch User Manual
Chapter 4: Web-Based Management
DEFAULT VALUE
32768 + MAC
32768
2 seconds
20 seconds
15 seconds
DEFAULT VALUE
128
200,000-100Mbps
Fast Ethernet ports
20,000-1000Mbps
Gigabit Ethernet ports
0 - Auto
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