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Table 13-8 Flow control operation determined by the auto-negotiation result
#
Switch
Send pause
Receive
packet
pause
packet
on
any
any
on
desired
any
any
desired
off
off
#
any
indicates that any setting is allowed for the Switch (
remote device (
(4) Automatic MDIX functionality
The automatic MDIX functionality automatically switches between MDI and MDI-X. The
functionality enables communication via either a crossover cable or a straight cable, and is
available only when auto-negotiation is used. If the connection mode (full duplex or half
duplex) is fixed, MDI-X is always selected. The following table shows the MDI and MDI-X
pin mappings.
#
Remote device
Send pause
Receive
packet
pause
packet
Enabled
any
any
Enabled
Disabled
Disabled
Enabled
any
any
Enabled
Disabled
Disabled
Enabled
any
any
Enabled
Disabled
Disabled
Enabled
any
any
Enabled
Disabled
Disabled
Enabled
any
any
Enabled
Disabled
Disabled
Enabled
or
Disabled
).
Result of
Flow control operation
auto-negotiat
ion on the
Switch
Pause packet
Is
sending
regulated
on the
Switch?
Enabled
Yes
Enabled
Yes
Disabled
No
Enabled
Yes
Enabled
Yes
Disabled
No
Enabled
Yes
Enabled
Yes
Disabled
No
Enabled
Yes
Enabled
Yes
Disabled
No
Disabled
No
Disabled
No
Disabled
No
on
,
off
, or
13 Ethernet
Is
sending
regulated
on the
remote
device?
Yes
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
Yes
No
No
No
No
desired)
or the
169
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