User manual

70 Publication ENET-UM001I-EN-P - January 2010
Chapter 5 Configure a Supervisor on a Device-level Ring Network
Functionality Description Default Setting
Supervisor
Precedence
You must configure a supervisor precedence number for each device configured as a ring
supervisor.
The highest possible supervisor precedence value is 255.
When multiple nodes are enabled as supervisor, the node with the highest precedence value is
assigned as
the active ring supervisor; the other nodes automatically become back-up supervisors.
We recommend that you:
• configure back-up supervisor nodes.
• set your desired Active Ring Supervisor with a relatively high supervisor
-precedence value
compared to the back-up nodes.
• keep track of your network’
s supervisor-precedence values.
If multiple supervisors are configured with the same precedence value (the
factory default value
for all supervisor-capable devices is 0), the node with the numerically highest MAC address
becomes the active supervisor.
0
Beacon Interval Frequency of the active ring supervisor transmitting a beaco
n frame through
both of its Ethernet
ports. This parameter is user configurable for any time between 200µS and 100mS.
400 µS
Beacon Timeout The beacon timeout is amount of time nodes wait before tim
ing out the reception of beacon
frames and taking appropriate action. Supervisors support a range from 400µS to 500mS.
1960 µS
Ring Protocol
VLAN ID
Reserved for future use. 0