User`s guide

Signamax 

 065-7726SPOE / 065-7726SPOE-FP 24-Port 10/100BaseT/TX
PoE Managed Switch User Manual
Publication date: February 2010
Revision A1.0
94
3-10-2. STP Configuration
The STP, Spanning Tree Protocol, actually includes RSTP. In the Spanning Tree
Configuration, there are six parameters open for the user to configure as the user prefers.
Each parameter description is listed below.
Function name:
STP Configuration
Function description:
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”.
Parameter description:
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 065-7726SPOEas 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 065-7726SPOEis 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.
Max. Age:
When the 065-7726SPOEis the root bridge, the whole LAN will apply this figure set
by this switch as their maximum age time. When a bridge received a BPDU
originated from the root bridge and if the message age conveyed in the BPDU
exceeds the Max. Age of the root bridge, the bridge will treat the root bridge
malfunctioned and issue a Topology Change Notification (TCN) BPDU to all other
bridges. All bridges in the LAN will re-calculate and determine who the root bridge is.
The valid value of Max. Age is 6 ~ 40 seconds. Default is 20 seconds.