WG82574IT S LBAC Intel, WG82574IT S LBAC Datasheet - Page 205

• Manufacturer Part Number: WG82574IT S LBAC
• Description: CONTROLLER, ENET, INTEL 82574IT, 64PQFN
• Manufacturer: Intel

Specifications of WG82574IT S LBAC

• Ethernet Type: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: QFN
• No. Of Pins: 64
• Package / Case: QFN
• Interface Type: I2C, JTAG, PCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

System Manageability—82574 GbE Controller
Note:
8.4.3.4
Port 0x298/0x26F filtering - The 82574L supports filtering by fixed destination port
numbers, port 0x26F and port 0x298.
Flex port filtering - The 82574L implements four flex destination port filters. The
82574L directs packets whose L4 destination port matches the value of the respective
word in the MFUTP registers. The MC must insure that only valid entries are enabled in
the decision filters.
Flex TCO filters - The 82574L provides two flex TCO filters. Each filter looks for a
pattern match within the 1st 128 bytes of the packet. The MC then configures the
pattern to match into the FTFT table. The MC must ensure that only valid entries are
enabled in the decision filters.
The flex filters are temporarily disabled when read from or written to by the host. Any
packet received during a read or write operation is dropped. Filter operation resumes
once the read or write access completes.
IP address filtering - The 82574L supports filtering by IP address using IPv4 and IPv6
address filters, dedicated to manageability.
Checksum filter - If bit MANC.EN_XSUM_FILTER is set, the 82574 directs packets to the
MC only if they pass L3/L4 checksum (if they exist), in addition to matching other filters
previously described.
Manageability Decision Filters
The manageability decision filters are a set of eight filters (MDEF0 –MDEF7), each with
the same structure. The filtering rule for each of MDEF0:MDEF6 is programmed by the
MC and defines which of the L2, VLAN, and manageability filters participate in the
decision. MDEF7 is programmed by the 82574 in response to the Receive Enable
command. Any packet that passes at least one rule is directed to manageability and
possibly to the host.
Possible filtering criteria are:
The structure of each of the decision filters is shown in
indicates that the input is conditioned on a mask bit defined in the MDEF register for
this rule. The decision filter rules are as follows:
• Packet passed a valid management L2 unicast address filter.
• Packet is a broadcast packet.
• Packet has a VLAN header and it passed a valid manageability VLAN filter.
• Packet matched one of the valid IPv4 or IPv6 manageability address filters.
• Packet is a multicast packet.
• Packet passed ARP filtering (request or response).
• Packet passed neighbor solicitation filtering.
• Packet passed 0x298/0x26F port filter.
• Packet passed a valid flex port filter.
• Packet passed a valid flex TCO filter.
• At least one bit must be set in a register. If all bits are cleared (MDEF = 0x0000),
• All enabled AND filters must match for the decision filter to match. An AND filter not
then the decision filter is disabled and ignored.
enabled in the register is ignored.
Figure
47. A boxed number
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