Intel PCI-X, Intel Gigabit Ethernet Controllers manual Wakeup Packet Storage, Crc

					Power Management
Offset	# of	Field	Value	Action		Comment
	Bytes
18+D+S	2	Payload Length	-	Ignore
						ICMP, or IPv6 next
			3Ah, 00h,			headers:
20+D+S	1	Next Header	2Bh, or	Check		+ routing (2Bh)
			3Ch			+ dest options (3Ch)
						+ hop-by-hop (00h)
21+D+S	1	Hop Limit	FFh	Check
22+D+S	16	Source IP Address	-	Ignore
38+D+S	16	Destination IP Address		Ignore
						Process headers to
						get next header.
54+D+S	N	Possible IPv6 Next Headers	-	Check		Header type must be
						routing, destination
						options, or hop-by-
						hop.
54+D+S+N	1	Type	87h	Check		Neighbor Solicitation
55+D+S+N	1	Code	00h	Check
56+D+S+N	2	ICMP Header Checksum	-	Ignore
58+D+S+N	4	Reserved	-	Ignore
62+D+S+N	16	Target Address	-	Check		Match IPV6AT[0]
78+D+S+N	N	Possible source link-layer	-	Ignore
		address
...	any	-	-	Ignore		Packet data
last 4	4	CRC	-	Compare		Validate correct

6.4.3.5Wakeup Packet Storage

The Ethernet controller saves the first 128 bytes of the wakeup packet in its internal buffer, which can be read through the Wakeup Packet Memory (WUPM) after system wakeup.

Software Developer’s Manual 151