User's Manual

4.9. Spanning Tree Settings
Spanning Tree Protocol (STP) is an IP network protocol that prevents undesirable loops caused by multiple active paths be-
tween network devices when multiple switches or bridges are used on a network.
Figure 54. Spanning Tree Settings
Path Advanced, SNMP, Spanning Tree
Parameters
• Status – Select Enable to enable STP. Select Disable to disable STP. DEFAULT: Disable
• HelloTime – Enter a value for Hello Time. This setting will determine how often in seconds the AN100/300 will send
the Hello Message to network switches and bridges to asses network topology. RANGE: 1-10 seconds. DEFAULT: 2
seconds
• MaxAge – Enter a duration for Max Age. This setting will determine how long the AN100/300 will wait for a Hello
Message from another switch or bridge. If no message is received within the set duration, the device will be considered
off-line and a new STP route will be congured. RANGE: 6-40 seconds. DEFAULT: 20 seconds.
• ForwardDelay – Enter a value for Forward Delay. This setting will determine the length of time the AN100/300 will take
to ‘listen’ to the network and either retain current topology or generate a new topology based upon network switch and
bridge status. RANGE: 4-30 seconds. DEFAULT: 4 seconds.
• Priority – Enter a value for Priority. This setting will help determine which bridge is the root bridge, or essentially which
switch controls the main road that network trafc is going to routed around to avoid loops. In this game, the lowest
score wins. The score is a total of MAC Address, the Priority number and a bunch of tie-breaker values that determine
the so called root bridge. Setting a lower Priority will help generate a lower score for a given switch. RANGE: 0-65535.
DEFAULT: 32768.
Configuration Instructions
To congure Spanning Tree Settings:
1. Click Advanced, Spanning Tree.
2. Specify the Spanning Tree Settings.
3. Click Save.