Intel PCI, PCI-X, Intel Gigabit Ethernet Controllers 6.4.3.3.2 Directed IPX Packet Example, 6.4.3.4 IPv6 Neighbor Discovery Filter

150 Software Developer’s Manual
Power Management
6.4.3.3.2 Directed 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.
6.4.3.4 IPv6 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
bytes Field Value Action Comment
06 Destination Address Compare MAC Header –
processed by main
address filter
66 Source Address Skip
12
12 + Sa
a. 82541PI/GI/EI and 82547GI/EI.
8
D = (0/8)aPossible LLC/SNAP Header
Skip
Compare or
Skipa
12 4
S = (0/4)aPossible VLAN Tag
Skip
Compare or
Skipa
12
12 + D + Sa2 Type 8137h Compare IPX
14
14 + D + Sa10 Some IPX Stuff - Ignore
24
24 + D + Sa6 IPX Node Address Receive
Address 0 Compare Must match Receive Address 0
1. Not applicable to the 82544GC/EI.
Offset # of
Bytes Field Value Action Comment
0 6 Destination Address Compare
MAC Header –
processed by main
address filter, or
broadcast
6 6 Source Address Skip
12 4 Possible VLAN Tag Compare or
Skip
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