Google recent paper on protective load balancing in TCP attempts to improve packet drops and latency by making the host change the flow path using the IPv6 Flow label. The Linux kernels gets the PLB support in Linux 6.2 this December, let us discuss with this is.

0:00 Intro
2:11 DCTCP
5:30 ECMP Routing
7:30 TCP PLB
11:20 Linux Kernel Support PLB

References
https://www.phoronix.com/news/TCP-PLB-Linux
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=957ed5e7129f2ce85dd76e4cdce749388295467d
https://dl.acm.org/doi/pdf/10.1145/3544216.3544226
https://www.rfc-editor.org/rfc/rfc2460#appendix-A
https://en.wikipedia.org/wiki/Equal-cost_multi-path_routing
https://www.rfc-editor.org/rfc/rfc8257
https://en.wikipedia.org/wiki/IPv6_packet
https://www.ietf.org/id/draft-lapukhov-bgp-ecmp-considerations-09.html

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