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IP113F
Preliminary Data Sheet
Loop back test
IP113F supports two kind of loop back test function, in-band loop back test and out-band loop back test.
Out-band loop back test
Users can instruct central IP113F to issue a maintenance frame onto the fiber port by programming MII
register 24 to request a loop back test. Central IP113F does not generate test frames and users need an
external packet source from PC.
1. Disconnect switch port and instruct the terminal IP113F to perform loop back and disable
terminal T2 timer by programming central IP113F through SMI
IP113F
(terminal)
IP113F
(central)
TP
Maintenance frame
(C1=1, C2-3=10, C8-15=10000000)
Maintenance frame
(C1=0, C2-3=11, C8-15=10000000)
(1)
(2)
MDC, MDIO
(MII reg 24)
TP
Switch
FX
IP113F
(terminal)
IP113F
(central)
TP
TP
(MII reg 0.14=1)
FX
Switch
2. Terminal IP113F runs at loop back mode
IP113F
(terminal)
IP113F
(central)
TP
TP
(MII reg 0.14=1)
3. PC forces test frames to central IP113F and terminal IP113F loops back the frames.
FX
test frame
test frame
PC
IP113F
(terminal)
IP113F
(central)
TP
TP
(MII reg 0.14=1)
FX
PC
4. PC reports the loop back test result after sending all test frames.
IP113F
(terminal)
IP113F
(central)
TP
Maintenance frame
(C1=1, C2-3=10, C8-15=00000000)
Maintenance frame
(C1=0, C2-3=11, C8-15=00000000)
(1)
(2)
MDC, MDIO
(MII reg 24)
5. Reconnect switch and instruct the central IP113F to end loop back test and enable T2 timer.
TP
Switch
FX
Confidential.
15/46
Aug. 20, 2003
Copyright © 2003, IC Plus Corp.
IP113F-DS-R02
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