User`s manual

Signamax 065-1600 series Managed Media Converter

Publication date: October, 2005

Revision 1.0

3-4-6-2. 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 desires. Each parameter description is listed below.

Function name:

STP State Setting

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 converter. 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

Signamax 065-1600 series as the root bridge, you can set this value

lower than that of the 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

Signamax 065-1600 series is the root bridge of the LAN, for example, all

other bridges will use the hello time assigned by Signamax 065-1600

series to communicate with each other. The valid value is 1 ~ 10 in unit

of second.

Default is 2 seconds.

Max. Age:

When Signamax 065-1600 series is the root bridge, the whole LAN will

apply this figure set by Signamax 065-1600 series 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.