82598EB Datasheet, PDF (236/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - Receive Functionality
Figure 3-25. RSS Block Diagram
3.5.2.10.1 RSS Hash Function
Section 3.5.2.10.1 provides a verification suite used to validate that the hash function is computed
according to Microsoft* nomenclature.
The 82598 hash function follows the Microsoft* definition. A single hash function is defined with several
variations for the following cases:
• TcpIPv4 – the 82598 parses the packet to identify an IPv4 packet containing a TCP segment. If
the packet is not an IPv4 packet containing a TCP segment, receive-side-scaling is not done for
the packet.
• IPv4 – the 82598 parses the packet to identify an IPv4 packet. If the packet is not an IPv4
packet, RSS is not done for the packet.
• TcpIPv6 – the 82598 parses the packet to identify an IPv6 packet containing a TCP segment. If
the packet is not an IPv6 packet containing a TCP segment, RSS is not done for the packet.
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