ZyXEL Communications MSAP2000 manual 105

MSAP2000 AAMS User’s Guide

Table 36 Spanning Tree Protocol: Configuration (continued)

LABEL	DESCRIPTION
MAX Age	This is the maximum time (in seconds) a switch can wait without receiving a BPDU
	before attempting to reconfigure. All switch ports (except for designated ports)
	should receive BPDUs at regular intervals. Any port that ages out STP information
	(provided in the last BPDU) becomes the designated port for the attached LAN. If it
	is a root port, a new root port is selected from among the switch ports attached to
	the network. The allowed range is 6 to 40 seconds.
Forwarding Delay	This is the maximum time (in seconds) a switch will wait before changing states.
	This delay is required because every switch 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 allowed range is 4 to
	30 seconds. As a general rule:
	2 * (Forward Delay - 1) >= Max Age >= 2 * (Hello Time + 1)
Port	This field identifies the Ethernet port.
Active	Select this check box to activate STP on this
port. Priority	Configure the priority for each port here.
	Priority decides which port should be disabled when more than one port forms
	a loop in a switch. Ports with a higher priority numeric value are disabled first.
	The allowed range is between 0 and 255 and default value is 128.
Path Cost	Path cost is the cost of transmitting a frame on to a LAN through that port. It is
	assigned according to the speed of the bridge. The slower the media, the
	higher the cost.
Apply	Click Apply to save your changes to the MSAP2000 AAMS’s volatile memory.
	The MSAP2000 AAMS loses these changes if it is turned off or loses power, so
	use the Config Save link on the navigation panel to save your changes to the
	non-volatile memory when you are done configuring.
Cancel	Click Cancel to begin configuring this screen afresh.

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