ExtremeXOS and Switch Engine Release Recommendations

Updated on 28 January 2026.

The following table lists recommended ExtremeXOS (EXOS) and Switch Engine releases for each hardware platform.

Maintenance Release Recommendation

The Maintenance Release recommendation is the actively supported version of the software that no longer receives new features and only includes new fixes.

 Note:The latest maintenance versions are generally safe, as they build on the recommended release with extra fixes.

The recommendation reflects the following criteria:

  • No open critical issues introduced in the referenced software release.
  • Release deployed in the field for at least three months (unless urgent fixes require the latest release).
  • Internal SQA regression testing completed without encountering any new issues.

Feature Release Recommendation

The Feature Release recommendation is the newest version of the software with the latest set of features and is fully supported.

The recommendation reflects the following criteria:

  • Less real-world usage history than Maintenance Release.
  • Upgrading for fixes may require moving to the next major release, which can include additional new features.

An asterisk (*) indicates that the software release shown is the final supported release for the hardware platform.

When deploying any software release, customers should always review the Release Notes for known issues that pertain to features and technologies used in their network. Only upgrade above recommendations to fix a specific issue or add a needed feature.

Release Recommendations

PlatformMaintenance ReleaseFeature Release
4120Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
4220Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
5120Switch Engine 33.5.2.118-Patch1-6Switch Engine 33.5.2.118-Patch1-6
5320-16P-2MXT-2XSwitch Engine 33.5.2.118-Patch1-6Switch Engine 33.5.2.118-Patch1-6
5320 (all other models)Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
5420M-24W-24S-4YESwitch Engine 33.5.2.118-Patch1-6Switch Engine 33.5.2.118-Patch1-6
5420 (all other models)Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
5520Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
5720Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
7520Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
7720Switch Engine 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6
X435EXOS 32.7.3.15-Patch1-33EXOS 33.5.2.118-Patch1-6
X440-G2EXOS 32.7.3.15-Patch1-33EXOS 33.5.2.118-Patch1-6
X450-G2EXOS 32.7.3.15-Patch1-33EXOS 33.5.2.118-Patch1-6
X460-G2EXOS 32.7.3.15-Patch1-33EXOS 33.5.2.118-Patch1-6
X465EXOS 32.7.3.15-Patch1-33EXOS 33.5.2.118-Patch1-6
X590EXOS 32.7.3.15-Patch1-33EXOS 32.7.3.15-Patch1-33
X620-T/P (copper)EXOS 31.7.4.2-Patch1-7EXOS 31.7.4.2-Patch1-7
X620-XEXOS 32.7.3.15-Patch1-33EXOS 32.7.3.15-Patch1-33
X670-G2EXOS 31.7.4.2-Patch1-7EXOS 31.7.4.2-Patch1-7
X690EXOS 32.7.3.15-Patch1-33EXOS 32.7.3.15-Patch1-33
X695EXOS 32.7.3.15-Patch1-33EXOS 33.5.2.118-Patch1-6
X870EXOS 31.7.4.2-Patch1-7EXOS 31.7.4.2-Patch1-7
V300Switch Engine 32.7.3.15-Patch1-33 or EXOS 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6 or EXOS 33.5.2.118-Patch1-6
V400Switch Engine 32.7.3.15-Patch1-33 or EXOS 32.7.3.15-Patch1-33Switch Engine 33.5.2.118-Patch1-6 or EXOS 33.5.2.118-Patch1-6