Alloy Computer Products GSM-8T16SFP - Manual (Page 86)

GSM Series User Manual
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Alloy Computer Products Pty Ltd Copyright ©2006
Max. Age:
If the GSM Series switch is the root bridge, the whole network will apply this
figure as their maximum age time. When a switch receives a BPDU message
originating from the root bridge and if the message age exceeds the maximum
age of the bridge, the bridge will treat the root bridge as malfunctioned and issue
a Topology Change Notification (TCN) BPDU to all other bridges. All bridges on
the network will re-calculate and determine who the root bridge is. The valid
value is 6 – 40 seconds.
Default: 20 seconds
Forward delay:
You can set the root bridge forward delay time. This figure is set by the root
bridge only. The forward delay time is defined as the time spent changing from
the Listening state to the Learning state and also from the Learning state to the
Forwarding state of a port in a bridge. The forward delay time contains two
states, Listening state to Learning state and Learning state to Forwarding state. It
assumes that the forward delay time is 15 seconds, then the total forward delay
time will be 30 seconds. This has much to do with the STP convergence time
which will be more than 30 seconds because of some other factors. The valid
value is 4 ~ 30 seconds
Default: 15 seconds.
Force Version:
The switch supports both STP (802.1d) and RSTP (802.1w). This option can be
selected here.