When The Switch Becomes Root - Enterasys Vertical Horizon VH-2402S Web Management Manual

When the Switch Becomes Root

Figure 3-18. STA Configuration - When the Switch Becomes Root
Parameter
Hello Time
Max (Message) Age
Forward Delay
9033821
Default Description
2 The time interval (in seconds) at which the root
device transmits a configuration message.
The minimum value is 1.
The maximum value is the lower of
10 or [(Max. Message Age / 2) -1].
20 The maximum time (in seconds) a device can wait
without receiving a configuration message before
attempting to reconfigure. All device ports (except
for designated ports) should receive configuration
messages at regular intervals. Any port that ages
out STA information (provided in the last
configuration message) becomes the designated
port for the attached LAN. If it is a root port, a new
root port is selected from among the device ports
attached to the network.
The minimum value is the higher of
6 or [2 x (Hello Time + 1)].
The maximum value is the lower of
40 or [2 x (Forward Delay - 1)].
15 The maximum time (in seconds) the root device will
wait before changing states (i.e., listening to
learning to forwarding). This delay is required
because every device must receive information
about topology changes before it starts to forward
frames. In addition, each port needs time to listen
for conflicting information that would make it return
to a blocking state; otherwise, temporary data loops
might result.
Maximum value is 30.
Minimum value is the higher of 4 or
[(Max. Message Age / 2) + 1].
Configuring and Monitoring the Switch 25