WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 169

• 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
7.3.6.2.3
Note:
IPv4 Header
IPv6 Header
TCP Header
UDP Header
TCP/IP/UDP Header for the Last Frame
The hardware makes the following changes to the headers of the last packet that is
derived from each TCP segmentation context.
Last frame payload bytes = PAYLEN - (N * MSS)
MAC Header (for SNAP Packets)
IPv4 Header
IPv6 Header
TCP Header
• IP Identification: incremented from last value (wrap around)
• IP Total Length = MSS + HDRLEN - IPCSS
• IP Checksum
• Payload Length = MSS + HDRLEN - IPCSS - Ipv6Size (while Ipv6Size = 40Bytes)
• Sequence Number update: Add previous TCP payload size to the previous sequence
• If FIN flag = 1b, it is cleared in these frames.
• If PSH flag =1b, it is cleared in these frames.
• TCP Checksum
• UDP Length: MSS + HDRLEN - TUCSS
• UDP Checksum
• Type/Len field = Last frame payload bytes + HDRLEN - 14
• IP Total Length = (last frame payload bytes + HDRLEN) - IPCSS
• IP Identification: incremented from last value (wrap around)
• IP Checksum
• Payload Length = last frame payload bytes + HDRLEN - IPCSS - Ipv6Size (while
• Sequence Number update: Add previous TCP payload size to the previous sequence
• If FIN flag = 1b, set it in this last frame
• If PSH flag =1b, set it in this last frame
• TCP Checksum
number value. This is equivalent to adding the MSS to the previous sequence
number.
Ipv6Size = 40Bytes)
number value. This is equivalent to adding the MSS to the previous sequence
number.
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