Supermicro AOC-PG-I2+ Guia do Utilizador descarregar pdf (Página 34)

AOC-PG-i2+ Add-on Card User’s Manual

4-8

If Speed = 10 or 100, then both Speed and Duplex should be set. Auto-negotiation is

disabled, and the AutoNeg parameter is ignored. Partner SHOULD also be forced.

The AutoNeg parameter is used when more control is required over the auto-negotiation

process. It should be used when you wish to control which speed and duplex

combinations are advertised during the auto-negotiation process. The parameter may

be specified as either a decimal or hexadecimal value as determined by Table 4-2

below.

Some examples of using AutoNeg:

modprobe e1000 AutoNeg=0x01 (Restricts autonegotiation to 10 Half)

modprobe e1000 AutoNeg=1 (Same as above)

modprobe e1000 AutoNeg=0x02 (Restricts autonegotiation to 10 Full)

modprobe e1000 AutoNeg=0x03 (Restricts autonegotiation to 10 Half or 10 Full)

modprobe e1000 AutoNeg=0x04 (Restricts autonegotiation to 100 Half)

modprobe e1000 AutoNeg=0x05 (Restricts autonegotiation to 10 Half or 100 Half)

modprobe e1000 AutoNeg=0x020 (Restricts autonegotiation to 1000 Full)

modprobe e1000 AutoNeg=32 (Same as above)

Note that when this parameter is used, Speed and Duplex must not be specified.

If the link partner is forced to a specific speed and duplex, then this parameter should

not be used. Instead, use the Speed and Duplex parameters previously mentioned to

force the adapter to the same speed and duplex.

Table 4-2. AutoNeg Parameter Values

Bit Position Decimal Value Hex Value Speed (Mbps) Duplex

7 128 80 N/A –

6 64 40 N/A –

5 32 20 1000 Full

4 16 10 N/A –

3 8 8 100 Full

2 4 4 100 Half

12110Full

0 1 1 10 Half

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 40

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