Table 4-36 (Continued). STP Status screen options.
Parameter Description
STP Topology Change Count
STP Topology Change Count expresses the time spent in unit of
seconds since the beginning of the Spanning Tree Topology
Change to the end of the STP convergence. Once the STP change
is converged, the Topology Change count will be reset to 0. The
figures showing in the screen may not be the exact time it spent
but very close to, because the time is eclipsing.
Time Since Last Topology
Change
Time Since Last Topology Change is the accumulated time in unit
of seconds the STP has been since the last STP Topology Change
was made. When Topology Change is initiated again, this counter
will be reset to 0. And it will also count again once STP topology
Change is completed.
4.15.2 STP C
ONFIGURATION
The STP, Spanning Tree Protocol, actually includes RSTP. In the Spanning Tree Configuration, there are six
parameters open for the user to configure as user’s idea. Each parameter description is listed below.
Table 4-37. STP Configuration screen options.
Parameter Description
STP Configuration
User can set the following Spanning Tree parameters to control STP
function enable/disable, select mode RSTP/STP and affect STP
state machine behavior to send BPDU in this switch. The default
setting of Spanning Tree Protocol is Disable.
Spanning Tree Protocol
Set 802.1W Rapid STP function Enable / Disable. Default is Disable.
Bridge Priority
The lower the bridge priority is, the higher priority it has. Usually, the
bridge with the highest bridge priority is the root. If you want to have
the LPB200Aas root bridge, you can set this value lower than that of
bridge in the LAN. The valid value is 0 ~ 61440. The default is 32768.
Hello Time
Hello Time is used to determine the periodic time to send normal
BPDU from designated ports among bridges. It decides how long a
bridge should send this message to other bridge to tell I am alive.
When the LPB200Ais the root bridge of the LAN, for example, all
other bridges will use the hello time assigned by this switch to
communicate with each other. The valid value is 1 ~ 10 in unit of
second.
Default is 2 seconds.
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