WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 139

• Manufacturer Part Number: WG82574L S LBA8
• Manufacturer: Intel

Specifications of WG82574L S LBA8

• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

Inline Functions—82574 GbE Controller
7.1.10.3
7.1.10.4
7.1.10.5
7.1.11
IPv4 Filter
This filter checks for valid IPv4 headers. The version field is checked for a correct value
(4).
IPv4 headers are accepted if they are any size greater than or equal to 5 (Dwords). If
the IPv4 header is properly decoded, the IP checksum is checked for validity. The
RXCSUM.IPOFL bit must be set for this filter to pass.
IPv6 Filter
This filter checks for valid IPv6 headers, which are a fixed size and have no checksum.
The IPv6 extension headers accepted are: hop-by-hop, destination options, and
routing. The maximum size next header accepted is 16 Dwords (64 bytes).
All of the IPv6 extension headers supported by the 82574 have the same header
structure:
NEXT HEADER is a value that identifies the header type. The supported IPv6 next
headers values are:
HDR EXT LEN is the 8-byte count of the header length, not including the first 8 bytes.
For example, a value of three means that the total header size including the NEXT
HEADER and HDR EXT LEN fields is 32 bytes (8 + 3*8).
The RFCTL.Ipv6_DIS bit must be cleared for this filter to pass.
UDP/TCP Filter
This filter checks for a valid UDP or TCP header. The prototype next header values are
0x11 and 0x06, respectively. The RXCSUM.TUOFL bit must be set for this filter to pass.
Multiple Receive Queues and Receive-Side Scaling (RSS)
The 82574 provides two hardware receive queues and filters each receive packet into
one of the queues based on criteria that is described as follows. Classification of
packets into receive queues have several uses, such as:
• Hop-by-hop = 0x00
• Destination options = 0x3C
• Routing = 0x2B
• Receive Side Scaling (RSS)
• Generic multiple receive queues
• Priority receive queues.
NEXT HEADER
Byte0
HDR EXT LEN
Byte1
Byte2
Byte3
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