ZyXEL Communications GS-2724, User Manual

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Chapter 11 Spanning Tree Protocol
GS-2724 User’s Guide
108
Figure 44 Multiple Rapid Spanning Tree Protocol
The following table describes the labels in this screen.
Table 26 Multiple Rapid Spanning Tree Protocol
LABEL DESCRIPTION
Status Click Status to display the MRSTP Status screen (see Figure 43 on page 107 ).
Tree This is a read only index number of the STP trees.
Active Select this check box to activate an STP tree. Clear this checkbox to disable an
STP tree.
Bridge Priority Bridge priority is used in determining the root switch, root port and designated port.
The switch with the highest priority (lowest numeric value) becomes the STP root
switch. If all switches have the same priority, the switch with the lowest MAC
address will then become the root switch. Select a value from the drop-down list
box.
The lower the numeric value you assign, the higher the priority for this bridge.
Bridge Priority determines the root bridge, which in turn determines Hello Time,
Max Age and Forwarding Delay.
Hello Time This is the time interval in seconds between BPDU (Bridge Protocol Data Units)
configuration message generations by the root switch. The allowed range is 1 to
10 seconds.
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.