draft-zzhang-bier-optimized-use-in-aidc
Optimized Use of BIER in AIML Data Centers
Use of multicast in AI Data Centers (AIDC) is getting attention for
efficient large-scale distribution of the same data to many
receivers, given the collectives like All2All and AllReduce.
Emerging technologies like In Network Compute(INC) can also benefit
from using in-network-distribution of the packets by offloading the
distribution of the flows to the network. Given the bursty nature of
short-lived all2all flows, BIER is a very good multicast technology
for AIDC because it does not need the per-establishment of the
multicast tree states. This document discusses further optimization
of BIER use in AIDC or similar deployment scenarios, and updates
RFC4604 by specifying an IGMP/MLD extension for sources to report
receiver information to the First Hop Routers. The extension can be
useful and is only needed when the source cannot impose the BIER
encapsulation.