Allied-telesis AT-S39 Manual de usuario Pagina 110

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Chapter 12: Rapid Spanning Tree Protocol Commands
110
hellotime Specifies the time interval between generating and
sending configuration messages by the bridge. This
parameter can be from 1 to 10 seconds. The default is
2 seconds.
forwarddelay Specifies the waiting period before a bridge changes
to a new state, for example, becomes the new root
bridge after the topology changes. If the bridge
transitions too soon, not all links may have yet
adapted to the change, resulting in network loops.
The default is 15 seconds. This parameter effects only
those ports operating in the STP compatible mode.
maxage Specifies the length of time after which stored bridge
protocol data units (BPDUs) are deleted by the bridge.
All bridges in a bridged LAN use this aging time to test
the age of stored configuration messages called
bridge protocol data units (BPDUs). For example, if you
use the default 20, all bridges delete current
configuration messages after 20 seconds. This
parameter can be from 6 to 40 seconds. The default is
20 seconds.
Note
The value for the maxage parameter must be less than
(2 x (hellotime +1)) and less than (2 x (forwarddelay -1)).
forceversion The forceversion parameter lets you choose
between
forcestpcompatible The bridge will use the RSTP
parameter settings, but will
transmit only STP BPDU
packets out the ports.
normalrspt The bridge will use RSTP. This
is the default setting.
7 28672 15 61440
Table 1 RSTP Bridge Priority Value Increments
Increment
Bridge
Priority
Increment
Bridge
Priority
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