SMC Networks 1000BASE-X Manual De Usuario

2-36

Max (Message) 

Age

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)].

Forward Delay 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.
The maximum value is 30. 
The minimum value is 

the higher of 4 or [(Max. Message Age / 2) + 1].