ZyXEL Communications GS1920v2 Series User Manual page 143

Advanced Application > Spanning Tree Protocol > MRSTP
Fig ure 110
The following table describes the labels in this screen.
Table 53 Advanced Application > Spanning Tree Protocol > MRSTP
L ABEL DESC RIPT IO N
Status Click
Sta tus
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.
Note: You must also activate
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) the 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.
Chapter 13 Spanning Tree Protocol
to display the
MRST P Sta tus
Multiple Ra pid Spa nning T re e
>
Applic a tio n Spa nning T re e Pro to c o l
on the Switch.
GS1920v2 Series User's Guide
143
screen (see Figure 111 on page
in the
> screen to enable MRSTP
C o nfig ura tio n
145).
Adva nc e d