Does RHEL support BIG TCP for high-speed networking?

Solution Verified - Updated -

Issue

  • Does RHEL support BIG TCP for high-speed networking?
  • We would like support for Big TCP to overcome current limits and reduce TCP/IP stack overhead with 200Gbit and 400Gbit being hit within data centers. Big TCP is about going past the current 64KB TSO/GRO packet limit size for IPv6 traffic by way of the IPv6 Jumbogram extension header. Enabling big TCP across both send/receive systems can lead to huge throughput improvements and lower latencies for high speed networking environments.
  • BIG TCP as described by Eric Dumazet at netdevconf 0x15 in 2021: https://netdevconf.info/0x15/session.html?BIG-TCP
  • LWN article Going big with TCP packets (2022)

Environment

  • Red Hat Enterprise Linux
  • TCP (Transmission Control Protocol)
  • High speed networking such as 40Gbps, 100Gbps, 200Gbps, 400Gbps

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