---
title: September 2020 VCL release ("Cheerios")
summary: null
url: https://www.fastly.com/documentation/reference/changes/2020/09/vcl-changes
---

Today the minimum version of VCL available across our network increased, unlocking the following changes:

## Release names

To make them more fun and memorable, we've begun giving each VCL release, starting with the current one, a themed codename. The current theme is food items.

## Variable re-categorization

We have re-categorized a lot of VCL variables in this release to reduce the number classified as miscellaneous. The reference pages for these variables have moved to new URLs. The old ones will redirect.

## Improved content

- `beresp.cacheable` now includes a reference for which HTTP status codes are considered cacheable by default
- `req.backend` now describes how it gets serialized

## New variables

- `req.backend.name`
- `req.backend.ip`
- `req.backend.port`
- `quic.num_packets.received`
- `quic.num_packets.decryption_failed`
- `quic.num_packets.sent`
- `quic.num_packets.lost`
- `quic.num_packets.ack_received`
- `quic.num_packets.late_acked`
- `quic.num_bytes.received`
- `quic.num_bytes.sent`
- `quic.rtt.minimum`
- `quic.rtt.smoothed`
- `quic.rtt.variance`
- `quic.rtt.latest`
- `quic.cc.cwnd`
- `quic.cc.ssthresh`