Allied Telesis management software layer 2+ fast ethernet switches Seconds Forwarddelay, Deleted

		AT-S62 Command Line User’s Guide
	normalmspt	The bridge uses MSTP. The
		bridge sends out MSTP BPDU
		packets from all ports except
		for those ports connected to
		bridges running STP. This is
		the default setting.
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, 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)).

maxhops	Specifies the maximum hops counter. MSTP
	regions use this parameter to discard BPDUs. The
	Max Hop counter in a BPDU is decreased every time
	the BPDU crosses an MSTP regional boundary.
	Once the counter reaches zero, the BPDU is
	deleted.
configname	Specifies the name of the MSTP region. The range is
	0 (zero) to 32 alphanumeric characters. The name is
	case-sensitive and must be the same on all bridges
	in a region. Examples include Sales Region and
	Production Region. The name must be enclosed in
	quotes.

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