Chapter 26: RSTP Commands
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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 range is 4 to 30 seconds. The default is 15 seconds.
This parameter effects only those ports operating in
the STP compatible mode.
maxage Specifies the length of time, in seconds, 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 value of 20, all
bridges delete current configuration messages after
20 seconds. The range of this parameter is 6 to 40
seconds. The default is 20 seconds.
Note
The value for the maxage parameter must be greater than
(2 x (hellotime +1)) and less than (2 x (forwarddelay -1)).
rstptype Sets the RSTP mode. The parameters are
forceversion equivalent. Values are:
stpcompatible The bridge uses the RSTP
parameter settings, but
transmits only STP BPDU
packets from the ports. This
option is equivalent to the
FORCESTPCOMPATIBLE
option.
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Table 5 Bridge Priority Value Increments
Increment Bridge
Priority Increment Bridge
Priority