OPTICAL SYSTEMS DESIGN
DOC ID: 10115303
OSD2251P OPERATOR MANUAL
PAGE 23
TOPOLOGY CHECK - <tc> Command Line
FIGURE 18: TOPOLOGY CHECK
In this case, only one OSD2251P is connected to the USB cable. The display indicates the following;
No:
1
– Number of units connected on the ring/bus (in this case only one unit)
MAC_ADDRESS: 00:26:dc:22:51:25
– Displays all the MAC addresses of the units connected on the
ring/bus
TOPOLOGY: Init
– Displaying type of connection (in this case “Init” as there is only one unit)
NODE_ROLE: MASTER
– Displays whether the unit is either the Master or Slave on the ring/bus (in
this case only one unit is connected thus displaying master). The Master unit is determined by the unit
with the lowest MAC address
PORT3: U_port
. Indicates the function of port 3 and its relation to the ring/bus. There are four
possibilities;
1.
M_port – Master Port (port facing the master)
2.
S_port – Slave Port (port back to the master)
3.
B_Port – Backup Port
4.
U_Port – Unconnected Port
PORT4: U_port
. Indicates the function of port 4 and its relation to the ring/bus. There are four
possibilities;
1.
M_port – Master Port
2.
S_port – Slave Port
3.
B_Port – Backup Port
4.
U_Port – Unconnected Port
<-local:
This points to the unit that the USB cable is plugged into on the ring/bus.
