---
title: bereq.between_bytes_timeout
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/backend-connection/bereq-between-bytes-timeout
---

**Type:** RTIME  
**Access:** can be read and set, but not unset

**Available in:** pass, miss

The between bytes timeout to the backend server.

When requests are relayed from one Fastly cache server to another (as a result of [clustering](https://www.fastly.com/documentation/guides/vcl/clustering) or [shielding](https://www.fastly.com/documentation/guides/concepts/shielding)) the timeout between bytes in effect on those connections is 60 seconds, and cannot be modified.

As a result, if a request is forwarded internally by Fastly before being forwarded to your backend server, the timeout between bytes is capped at 60 seconds.