Intel PCI Manuel D’Utilisation

147

The Ethernet controller supports receiving Directed IPv4

2

 packets for wakeup if the IPv4 bit is set 

in the WakeUp Filter Control Register (WUFC). Four IPv4 addresses are supported which are 
programmed in the IPv4 Address Table (IPv4AT). A successfully matched packet must contain the 

station’s MAC address, a Protocol Type of 0800h, and one of the four programmed IPv4 addresses. 

The Ethernet controller also handles Directed IPv4 packets that have VLAN tagging on both 
Ethernet II and Ethernet SNAP types.

1.

Directed IP Packet for the 82544GC/EI.

2.

IP instead of IPv4 for the 82544GC/EI.

6

Destination Address

Compare

MAC Header – 
processed by main 
address filter

6

Source Address

Skip
Ignore

a

8
D = (0/8)

a

Possible LLC/SNAP Header

Type<= 1500 
and 
AAAA_0300_
0000h

a

Skip
Check

a

4
S = (0/4)

a

Possible VLAN Tag

8100h and 
check ID

a

Skip
Check

a

2

Type

0800h

Compare

IP

1

Version/HDR length

4Xh

Compare

Check IPv4

b

 and 

header length

1

Type of Service

-

Ignore

2

Packet Length

-

Ignore

2

Identification

-

Ignore

2

Fragment Info

-

Ignore

1

Time to live

-

Ignore

1

Protocol

-

Ignore

2

Header Checksum

-

Ignore

4

Source IP Address

-

Ignore

4

Destination IP Address

IPv4AT

b

Compare

May match any of four 
values in IPv4AT

b

a.

82541PI/GI/EI and 82547GI/EI only.

b.

IP instead of IPv4 for the 82544GC/EI.