Interlogix NS3502-8P-2S User Manual - Manual (Page 146)

IFS NS3502-8P-2S User Manual
146
The following are the user-configurable STP parameters for the port or port group level:
Variable Description Default Value
Port
Priority 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 128
Port Cost A value used by STP to evaluate
paths – STP calculates path costs
and selects the path with the
minimum cost as the active path 200,000-100Mbps Fast
Ethernet ports
20,000-1000Mbps Gigabit
Ethernet ports
0 - Auto
Default Spanning-Tree Configuration
Feature Default Value
Enable state STP disabled for all
ports
Port priority 128
Port cost 0
Bridge Priority 32,768
User-Changeable STA Parameters
The Switch’s factory default setting should cover the majority of installations. However, 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.
Hello Time – The Hello Time can be from 1 to 10 seconds. This is the interval between two
transmissions of BPDU packets sent by the Root Bridge to tell all other Switches that it is indeed the
Root Bridge. If you set a Hello Time for your Switch, and it is not the Root Bridge, the set Hello Time will
be used if and when your Switch becomes the Root Bridge.
The Hello Time cannot be longer than the Max. Age. Otherwise, a
configuration error will occur.
Max. Age – The Max Age can be from 6 to 40 seconds. At the end of the Max Age, if a BPDU has still not
been received from the Root Bridge, your Switch will start sending its own BPDU to all other Switches
for permission to become the Root Bridge. If it turns out that your Switch has the lowest Bridge
Identifier, it will become the Root Bridge.