Intel Intel Gigabit Ethernet Controllers, PCI-X manual Directed IPX Packet Example

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6.4.3.3.2Directed IPX Packet Example

A valid Directed IPX Packet contains the station’s MAC address, a Protocol Type of 8137h, and an IPX Node Address that equals to the station’s MAC address. It can include LLC/SNAP Headers and VLAN Tags. Since filtering this packet relies on the flexible filters, which use offsets specified by the OS directly, the OS must account for the extra offset LLC/SNAP Headers and VLAN tags.

Offset		# of		Field	Value	Action	Comment
		bytes
0		6		Destination Address		Compare	MAC Header –
							processed by main
6		6		Source Address		Skip	address filter
12		8		Possible LLC/SNAP Header		Skip
	a		a			Compare or
12 + S		D = (0/8)
						Skipa
12		4		Possible VLAN Tag		Skip
			a			Compare or
		S = (0/4)
						Skipa
12		2		Type	8137h	Compare	IPX
12 + D + Sa
14		10		Some IPX Stuff	-	Ignore
14 + D + Sa
24		6		IPX Node Address	Receive	Compare	Must match Receive
24 + D + Sa					Address 0		Address 0

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

6.4.3.4IPv6 Neighbor Discovery Filter1

In IPv6, a Neighbor Discovery packet is used for address resolution. A flexible filter can be used to check for a “Neighborhood Discovery Packet”.

82541xx and 82547GI/EI Only

Offset	# of	Field	Value	Action	Comment
	Bytes
0	6	Destination Address		Compare
6	6	Source Address		Skip	MAC Header –
					processed by main
				Compare or
12	4	Possible VLAN Tag			address filter, or
				Skip
					broadcast
12	8	Possible LLC/SNAP Header		Compare or
				Skip
12+D+S	2	Type	86DDh	Compare	IP
14+D+S	1	Version/ Traffic Class	6Xh	Compare	Check IPv6
15+D+S	3	Traffic Class/Flow Label	-	Ignore

1.Not applicable to the 82544GC/EI.

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