Because sFlow provides the complete packet header
, passive OS identification techniques are used on TCP SYN packets to determine the probable operating system of the host sending the SYN packet.
In this 100 GbE packet parser reference design, these capabilities are used to parallelize the processing of multiple fields of an entire 100 GbE packet header
, enabling the parsing function to be completed in a record 17 ns latency and making the parser software configurable to handle different L2 formats or extended to L3 and L4 parsing.
In the first stage, the platform employs stateless packet filtering, which verifies that the packet's source and destination addresses are different and that the packet header
is well formed.
Furthermore, this Intel Ethernet controller has sophisticated load sharing features allowing it to direct incoming Ethernet packets to a specific core within a specific processor based on hashed packet header
values, optimizing system performance.
The system's universal inspection engine and iRules can read values of an IP-based packet header
or payload and direct it to the appropriate resource.
Classification includes L7 protocol and application format identification as well as a pattern match engine that identifies text patterns in the packet header
DiffServ marks the IP packet header
with a type-of-service field, which allows delay-sensitive traffic to be assigned a higher priority than delay-tolerant traffic.
NetLogic Microsystems' industry-leading knowledge-based processors accelerate high-speed packet header
inspection and application-aware processing functions to deliver best-in-class performance on next-generation networking, access, data center and security applications.
The emulator modifiers change packet header
fields, including source address, destination address, ToS, DSCP, TTL, protocol, transport checksum, network checksum, source port and destination port.
To distinguish between different types of applications, such as file transfers, Web browsing and real-time applications, LAN switches need to use packet header
information beyond the network layer.