Intel 82558 Manuale Utente

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There are two groups of pre-defined filters:

—

The NBH, ARP and IA-Type pre-defined filters each use the word match field.

—

The IA-Match and TCO pre-defined filters do not use the word match field.

A single programming word may contain both a pre-defined filter from group 1 and any 

of the pre-defined filters in group 2. For example, a single programming word may be 

used to activate: ARP IA-Match and TCO with or without VLAN tagging (depending on 
the VLAN bit). The examples below describe 82559 wake-up programming for:

—

ARP without VLAN, IP address equals 8F.B9.3F.3Dh

—

Individual IP with VLAN tagging

—

Wake on TCO packet without VLAN (due to unavailable hardware management on 

the SMB)

—

Neighborhood name query (which is described in more detail under the Flexible 

Filter bullet)

EII Byte Offset
13, 12
21
41, 40

Pattern
06, 08
01
Word match

Meaning
ARP type = 0806h.
ARP opcode (01 = request).
Two LSB of the destination IP address.

The IA with Type match bit monitors for the destination MAC address of the incoming 
packet identical to the 6 bytes of the 82559 Individual Address, and the MAC Type/
Length field must be identical to the filter word match fields. The byte offset of the MAC 
Type/Length field in 802.2 snap type is shifted by 8 bytes ahead and shifted by an 
additional 4 bytes if the filter VLAN flag is set.

The destination MAC address of the incoming packet is identical to the 6 bytes of the 
82559 Individual Address.

The 82559 supports a TCO packet filter. The 82559 recognizes TCO packets for power 
management events at Ethernet Type II with or without VLAN tagging according to the 
following fields.

Byte Offset
5, 4, ..., 0
13, 12
14
23
37, 36

Pattern
IA Address
00, 08
45
11/04
02, 6F

Meaning
MAC destination address.
IP type = 0800h.
IPv4, 4 Dword length.
Protocol: either UDP or TCP.
TCO Port number 026Fh (0623 decimal).

NOTE: If receive to a TCO controller is enabled, then this bit has no affect on PME.

8008 0000

The EL bit is active.

yyyy yyyy

This is the pointer to the next CB structure (no affect if 
the EL bit is active).

4900 3F3D

ARP and TCO share the same programming filter.

6400 0800

IA-Type with VLAN tagging with IP type (0800h)

98xx xxxx
zzzz zzzz
zzzz zzzz
zzzz zzzz

This is the flexible filter for neighborhood name query. 
The CRC word equals xxxxxxh. The filter mask is 
composed of 3 Dwords. If the filter resources are a 
concern, the driver may use a more efficient mask for 
this filter.