MNS-BB Software User Guide
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13.3.1 Explaining Parameters in Detail
The following parameters are explained in detail.
Spanning Tree Enabled(Global): This field indicates whether STP is enabled or disabled globally
i.e. if the values is YES, all ports have STP enabled, otherwise, all ports have STP disabled.
Spanning Tree Enabled(Ports): This field indicates which ports have STP enabled.
Bridge Priority: This field specifies the switch (bridge) priority value which is used along with the
switch MAC address to determine the root device. Lower values mean higher priority. Value ranges
from 0 to 65535. Default value is 32768.
Bridge Forward Delay: This field indicates the time duration the switch will wait from listening to
learning states and from learning to forwarding states. The value ranges from 4 to 30 seconds. Default
value is 15.
Bridge Hello Time: When the switch is the root device, this is the time between messages being
transmitted. The value is from 1 to 10 seconds. Default value is 2 seconds.
Bridge Max Age: This is the maximum age a received message with STP information is allowed by
the switch before the switch checks all messages and updates the address table again. Value ranges
from 6 to 40 seconds with default value of 20 seconds.
Root Port: This field indicates the port number, which is elected as the root port of the switch.
Root Path Cost: This field indicates the root ports path cost. A path cost is assigned to individual
ports for the switch to determine which ports are the forwarding points. A higher cost means more
loops, a lower cost means fewer loops. More loops equal more traffic and a slower system.
Designated Root: This field shows the MAC address of the bridge in the network elected or
designated as the root bridge.
Designated Root Priority: This field shows the designated root bridge’s priority.
Root Bridge Forward Delay: This field indicates the designated root bridge’s forward delay. This is
the time the switch waits from the listening to the forwarding state. The default is 15 seconds. Can
be set between 4-30 seconds.
Root Bridge Hello Time: This field indicates the designated root bridge’s hello time.
Root Bridge Max Age: This field indicates the designated root bridge’s Max Age.
13.3.2 Showing STP Configuration by Port
To show STP configuration by ports, an example shows below
LE2425A#show stp ports
STP Port Configuration:
------------------------------------------------------------------------------------------
Port# Type Priority Path Cost State Des. Bridge Des. Port
------------------------------------------------------------------------------------------
01 TP(10/100) 128 100 Forwarding 80:00:00:20:06:25:00:62 80:01
02 TP(10/100) 128 100 Disabled 80:00:00:20:06:25:00:62 80:02
03 TP(10/100) 128 100 Disabled 80:00:00:20:06:25:00:62 80:03
04 TP(10/100) 128 100 Disabled 80:00:00:20:06:25:00:62 80:04
05 TP(10/100) 128 100 Forwarding 80:00:00:20:06:25:00:62 80:05
06 TP(10/100) 128 100 Disabled 80:00:00:20:06:25:00:62 80:06
07 TP(10/100) 128 100 Forwarding 80:00:00:20:06:25:00:62 80:07
08 TP(10/100) 128 100 Disabled 80:00:00:20:06:25:00:62 80:08
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