Atop Industrial Managed Ethernet Switch
EH7510
User Manual V 1.0
48
Table 2.27
Label
Description
Factory Default
Spanning Tree
Choose to enable or disable Spanning Tree.
Disabled
Force Version
Select
STP
or
RSTP.
RSTP
Priority
Configures the bridge priority in the range of 0 ~
61440.The switch with lower bridge priority has
more chance to become a root bridge.
32768
Maximum Age
If a device is not the root and it doesn’t receive
hello message in “Max. Age”, it will reconfigure
itself as a root.
See note below for “hello message”.
Range from 6 to 40 seconds.
20
Hello Time
Amount of time the root waits between sending
hello messages. See note below.
Range from 1 to 10 seconds.
2
Forward Delay
Configures the amount of time to wait before
checking to see if the device should change
from the learning state to the forwarding state.
Less delay time means changing state quickly.
Range from 4 to 30 seconds.
15
Root Priority
Indicates the current root priority value.
Dependant
Root MAC Address
Indicates the current root MAC address.
Dependant
Root Path Cost
Indication of cost. Higher cost means less
suitability for Spanning Tree topology.
Dependant
Root Port
Indicates the port that receives the best BPDU.
See note below.
Dependant
Root Maximum Age
Indicates the current root maximum ageing time
value.
Dependant
Root Hello Time
Indicates the current hello time value.
Dependant
Root Forward Delay
Indicates the current root forward delay time
value.
Dependant
Topology Changes
Indicates the time which topology change is
occurred.
Dependant
Last
Topology
changes
Indicates the working time since last Topology
changes occurred.
Dependant
*NOTE
-
“Hello” Message:
The root of the Spanning Tree topology
periodically sends out a “hello”
message to other devices on the network to check if the topology is healthy.
- BPDU:
In STP, to ensure that each bridge has enough information, the bridges use
special data frames called
B
ridge
P
rotocol
D
ata
U
nits (BPDU) to exchange information
about bridge IDs and root path costs.
