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IP113F
Preliminary Data Sheet
Loop back test (continued)
In-band loop back test
Besides performing the loop back test with an external packet source, IP113F supports an easy
alternative. IP113F sends out private maintenance frame to do loop back test. All users have to do is to
program MII registers through SMI.
1. Disabe receive function of central TP port and instruct the terminal IP113F to perform loop back
and disable T2 timer by programming central IP113F through SMI
IP113F
(terminal)
IP113F
(central)
TP
Maintenance frame
(C1=1, C2-3=10, C8-15=10000000)
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 and acknowledges with maintenance frame
Maintenance frame
(C1=0, C2-3=11, C8-15=10000000)
IP113F
(terminal)
IP113F
(central)
TP
(MII reg 0.14=1)
3. Central IP113F forces test frames to terminal IP113F and terminal IP113F loops back the
test frames. Central IP113F checks the received test frame.
FX
test frame
test frame
TP
Switch
MDC, MDIO
(MII reg 24,25)
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)
4. Central IP113F ends loop back test enables receive function of TP port and enable LP T2 timer
TP
Switch
FX
Confidential.
16/46
Aug. 20, 2003
Copyright © 2003, IC Plus Corp.
IP113F-DS-R02
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