Interlogix NS3552-8P-2S-V2 User Manual page 137

The following are the user-configurable STP parameters for the switch level:
Parameter
Bridge Identifier (Not
user configurable
except by setting
priority below)
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 Description
A relative priority for each port – lower
Port Priority
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 –
Port Cost
STP calculates path costs and selects the
path with the minimum cost as the active
path
Default spanning-tree configuration
Feature
Enable state
Port priority
Port cost
Bridge Priority
User-changeable STA parameters
The factory default settings for the switch should cover the majority of installations. It is
advisable to keep the default settings as set at the factory unless it is absolutely
necessary. The user changeable parameters in the switch are as follows:
• Priority – A priority for the switch can be set from 0 to 65535. 0 is equal to the
highest priority.
NS3552-8P-2S-V2 User Manual
Description
A combination of the user-set priority and the switch's
MAC address.
The Bridge Identifier consists of two parts: A 16-bit
priority and a 48-bit Ethernet MAC address 32768 +
MAC.
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 of time spent by a port in the learning and
listening states waiting for a BPDU that may return the
port to the blocking state.
Default Value
STP disabled for all ports
128
0
32,768
Chapter 4: Web configuration
Default Value
128
200,000-100Mbps Fast Ethernet ports
20,000-1000Mbps Gigabit Ethernet ports
0 - Auto
Default Value
32768 + MAC
32768
2 seconds
20 seconds
15 seconds
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