# EIP-8411 Proposes Fast Execution Payload Broadcast for Ethereum with Chunking Mechanism

Canonical: https://forkbrief.com/news/d1fa15f3-df40-49a6-8c4a-11eae24af228
Published: 2026-09-08T14:15:19.389Z
Publisher: Fork Brief

EIP-8411, introduced on September 7, 2026, proposes a new mechanism for broadcasting execution payloads in Ethereum by chunking payloads and using Merkle roots for efficient verification. This design aims to improve scalability and reduce propagation latency as execution payload sizes grow.

## EIP-8411 Proposal Aims to Address Payload Propagation Challenges

EIP-8411 was introduced as an improvement for Ethereum's execution payload broadcast process. It replaces the single-message execution_payload topic, introduced by EIP-7732, with an execution_payload_chunks topic. Under the new design, payloads are split into smaller chunks and distributed individually. Each set of chunks is committed to using a Merkle root—payload_chunks_root—which is included in the execution bid, ensuring each chunk's integrity can be verified independently. [ethereum-magicians.org](https://ethereum-magicians.org/t/eip-8411-fast-execution-payload-broadcast/29613)

## Motivation: Reducing Latency and Improving Efficiency

As Ethereum moves towards higher gas limits, resulting in larger execution payloads, propagation latency and network inefficiencies become significant issues. The current broadcast mechanism can lead to in-flight duplicate data and delays, as peers must download the entire payload before forwarding it. The chunking approach of EIP-8411 allows peers to start forwarding each chunk upon arrival while duplicate transfers are capped at the chunk size, potentially improving network scalability and robustness. [ethereum-magicians.org](https://ethereum-magicians.org/t/eip-8411-fast-execution-payload-broadcast/29613)

## Sources

- [EIP-8411: Fast Execution Payload Broadcast](https://ethereum-magicians.org/t/eip-8411-fast-execution-payload-broadcast/29613) — Ethereum Magicians

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