# Switch Firmware 2.1s Released!

**URL:** <https://forum.alta.inc/t/switch-firmware-2-1s-released/4610>\
**Category:** Switches\
**Created:** [February 13, 2025, 6:07pm UTC](https://forum.alta.inc/t/switch-firmware-2-1s-released/4610 "2025-02-13T18:07:15Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Alta-MikeD](https://forum.alta.inc/user_avatar/forum.alta.inc/alta-miked/32/1942_2.png) [@Alta-MikeD](https://forum.alta.inc/u/Alta-MikeD)\
**Post date:** [February 13, 2025, 6:07pm UTC](https://forum.alta.inc/t/switch-firmware-2-1s-released/4610/1 "2025-02-13T18:07:15Z")

</div>

We’ve released new firmware for our switches, featuring the following changes:

- Add support for configuring flow control.
- S8/S16: Resolve incorrectly reported ports on LACP links.
- Improve IGMP snooping stability.

**This update is being rolled out now.** You can manually initiate the upgrade if you’d like, or it will automatically update overnight (if auto-updates are enabled). The complete, up-to-date changelog is available here:

> [@Switch - Release Notes](https://forum.alta.inc/t/switch-release-notes/839#p-2555-h-21s-release-notes-1):
>
> Thanks for all of your feedback helping improve the Alta products! 2.3n Released on 12/11/2025 Add support for learning Device IP addresses using ARP requests in addition to responses. Resolve issue with DHCP guard when gateway MAC changes. 2.3m Released on 12/03/2025 Improve handling of potentially incorrect network settings. 2.3k Released on 11/11/2025 Improve overall system stability. Improve IGMP snooping support on S48-APOE/S12. 2.3j Released on 10/24/2025 Resolve issues with in…

As always, if you have questions or encounter any issues, feel free to reply here or start a new topic. Please include details about the issue so we can assist you effectively.

---

<div class="post-metadata">

**Author:** ![anon77415413](https://forum.alta.inc/letter_avatar_proxy/v4/letter/a/f1d935/32.png) [@anon77415413](https://forum.alta.inc/u/anon77415413)\
**Post date:** [February 13, 2025, 9:10pm UTC](https://forum.alta.inc/t/switch-firmware-2-1s-released/4610/2 "2025-02-13T21:10:50Z")

</div>

Update installed on my home S24-PoE and S8-PoE. No issues to report.

---

<div class="post-metadata">

**Author:** ![system](https://forum.alta.inc/uploads/default/original/1X/087669c3d7c0a6495087b41d6f385a6771f2231c.png) [@system](https://forum.alta.inc/u/system)\
**Post date:** [January 12, 2026, 4:27pm UTC](https://forum.alta.inc/t/switch-firmware-2-1s-released/4610/4 "2026-01-12T16:27:11Z")

</div>

This thread has been automatically closed due to inactivity. If you believe you have the same issue, please create a new post describing your issue. Feel free to link to this post for context if desired.