72
Bridge Configuration
Priority (0-61440)
: RSTP uses bridge ID to determine the root bridge, the
bridge with the highest bridge ID becomes the root bridge. The bridge ID is
composed of bridge priority and bridge MAC address. So that the bridge
with the highest priority becomes the highest bridge ID. If all the bridge ID
has the same priority, the bridge with the lowest MAC address will then
become the root bridge.
Note: The bridge priority value must be in multiples of 4096. A device with a
lower number has a higher bridge priority. Ex: 4096 is higher than 32768.
Max Age (6-40)
: Enter a value from 6 to 40 seconds here. This value
represents the time that a bridge will wait without receiving Spanning Tree
Protocol configuration messages before attempting to reconfigure.
If JetNet is not the root bridge, and if it has not received a hello message
from the root bridge in an amount of time equal to Max Age, then JetNet will
reconfigure itself as a root bridge. Once two or more devices on the
network are recognized as a root bridge, the devices will renegotiate to set
up a new spanning tree topology.
Hello Time (1-10)
: Enter a value from 1 to 10 seconds here. This is a
periodic timer that drives the switch to send out BPDU (Bridge Protocol
Data Unit) packet to check current STP status.
The root bridge of the spanning tree topology periodically sends out a
“hello” message to other devices on the network to check if the topology is
“healthy”. The “hello time” is the amount of time the root has waited during
sending hello messages.
Forward Delay Time (4-30)
: Enter a value between 4 and 30 seconds.
This value is the time that a port waits before changing from Spanning Tree
Protocol learning and listening states to forwarding state.
This is the amount of time JetNet will wait before checking to see if it should
be changed to a different state.
Once you have completed your configuration, click on
Apply
to apply your
settings.
Note
: You must observe the following rule to configure Hello Time,
Forwarding Delay, and Max Age parameters.
2 × (Forward Delay Time – 1 sec)
≥
Max Age Time
≥
2 × (Hello Time
value + 1 sec)
Port Configuration
Select the port you want to configure and you will be able to view current
settings and status of the port.
Path Cost
: Enter a number between 1 and 200,000,000. This value
represents the “cost” of the path to the other bridge from the transmitting
