WG82574L S LBA9 Intel, WG82574L S LBA9 Datasheet - Page 152

• Manufacturer Part Number: WG82574L S LBA9
• Description: CONTROLLER, ENET, INTEL 82574L, 64PQFN
• Manufacturer: Intel

Specifications of WG82574L S LBA9

• Ethernet Type: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: 0°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

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Two configuration bits impact the choice of the hash function as previously described:
A packet is identified as containing a TCP segment if all of the following conditions are
met:
Bits[31:16] of the Multiple Receive Queues Command register enable each of the hash
function variations (several can be set at a given time). If several functions are enabled
at the same time, priority is defined as follows (skip functions that are not enabled):
IPv4 packet:
IPv6 packet:
The following combinations are currently supported. Other combinations might be
supported in future products.
IPv4 hash types:
1. Try using the TcpIPv4 function. If does not meet the requirements, try 2.
2. Try using the IPv4 function.
1. Try using the TcpIPv6 function. If does not meet the requirements, try 2.
2. Try using the IPv6Ex function. If does not meet the requirements, try 3.
3. Try using the IPv6 function.
• IPv6Ex - The 82574L parses the packet to identify an IPv6 packet. Extension
• IPv6 - The 82574L parses the packet to identify an IPv6 packet. If the packet is not
• IPv6_ExDIS bit in Receive Filter Control (RFCTL) register: When set, if an IPv6
• NEW_IPV6_EXT_DIS bit in Receive Filter Control (RFCTL) register: When set, if an
• The transport layer protocol is TCP (not UDP, ICMP, IGMP, etc.).
• The TCP segment can be parsed (such as, IP parsed options, packet not
• The packet is not fragmented (even if the fragment contains a complete TCP
• S1a - TcpIPv4 is enabled as defined above, or
• S1b - Both TcpIPv4 and IPv4 are enabled - the packet is first parsed according to
headers should be parsed for a Home-Address-Option field (for source address) or
the Routing-Header-Type-2 field (for destination address). Note that the packet is
not required to contain any of these extension headers to be hashed by this
function. If the packet is not an IPv6 packet, receive-side-scaling is not done for
the packet.
an IPv6 packet, receive-side-scaling is not done for the packet.
packet includes extension headers, then the TcpIPv6 and IPv6Ex functions are not
used.
IPv6 packet includes either a Home-Address-Option or a Routing-Header-Type-2,
then the TcpIPv6 and IPv6Ex functions are not used.
encrypted).
header).
TcpIPv4 rules. If not identified as a TcpIPv4 packet, it is then parsed as an IPv4
packet.
82574 GbE Controller—Inline Functions