Intel PCI-X manual 3.1.5 ARP/IPv4 Request Packet1, + D + S a, Arp

Power Management

6.4.3.1.5ARP/IPv4 Request Packet1

The Ethernet controller supports receiving ARP Request packets for wakeup if the ARP bit is set in the Wakeup Filter Control Register (WUFC). Four IPv4 addresses are supported which are programmed in the IPv4 Address Table (IPv4AT)2. A successfully matched packet must contain a broadcast MAC address, a Protocol Type of 0806h, an ARP OPCODE of 01h, and one of the four programmed IPv4 addresses. The Ethernet controller also handles ARP Request packets that have VLAN tagging on both Ethernet II and Ethernet SNAP types.

	Offset	# of	Field	Value	Action	Comment
		bytes
0		6	Destination Address		Compare
6		6	Source Address		Skip	MAC Header –
		8			Skip
12			Possible LLC/SNAP Header	Type<= 1500 and		processed by main
12	+ Sa	D = (0/8)a		AAAA_0300_0000ha	Checka	address filter
12		4	Possible VLAN Tag	8100h and check IDa	Skip
		S = (0/4)a			Checka
12	+ D + Sa	2	Type	0806h	Compare	ARP
12
14	+ D + Sa	2	HW Type	0001h	Compare
14
16	+ D + Sa	2	Protocol Type	0800h	Compare
16
18	+ D + Sa	1	Hardware Size	06h	Compare
18
19	+ D + Sa	1	Protocol Address Length	04h	Compare
19
20	+ D + Sa	2	Operation	0001h	Compare
20
22	+ D + Sa	6	Sender HW Address	-	Ignore
22
28	+ D + Sa	4	Sender IP Address	-	Ignore
28
32	+ D + Sa	6	Target HW Address	-	Ignore
32
38	+ D + Sa	4	Target IP Address	IPv4ATb	Compare	May match any of 4
38						values in IPv4ATb

a.82541PI/GI/EI and 82547GI/EI only.

b.IPAT for the 82544GC/EI.

1.ARP Request Packet for the 82544GC/EI.

2.Four IP addresses are supported which are programmed in the IP Address Table (IPAT) for the 82544GC/EI.

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