ZyXEL Communications GS2220 Series - Configure Multiple Rapid Spanning Tree Protocol

Chapter 13 Spanning Tree Protocol
GS2220 Series User’s Guide
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13.8 Co nfig ure Multiple Ra pid Spa nning Tre e Proto c o l
To configure MRSTP, click MRSTP in the Adva nc e d Applic a tion > Spa nning Tre e Pro to c o l screen.
Fig ure 139 Advanced Application > Spanning Tree Protocol > MRSTP
The following table describes the labels in this screen.
Table 71 Advanced Application > Spanning Tree Protocol > MRSTP
LABEL DESC RIPTIO N
Status Click Sta tus to display the MRSTP Sta tus screen.
Tree This is a read only index number of the STP trees.
Active Select this check box to activate an STP tree. Clear this check box to disable an STP tree.
Note: You must also activate Multiple Ra pid Spa nning Tre e in the Adva nc e d
Applic a tio n > Spa nning Tre e Pro to c o l > C o nfig ura tio n screen to enable MRSTP
on the Switch.
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 He llo Tim e , Ma x Ag e and
Fo rwa rding De la y.
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.