Software Release Recommendations for XCO (EFA), SLX-OS, NOS, and NetIron

The following table lists recommended software releases for Extreme Cloud Orchestrator (XCO, formerly Extreme Fabric Automation) and for hardware platforms based on SLX-OS, Network OS, and NetIron.

All recommendations are as of 14 February 2024.

The recommended Maintenance Release reflects the actively maintained release for the software. Patches, when they are made available, are generally based on this release. 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. (As an exception, the latest release would be recommended if critical fixes affecting existing deployment were added to the release.)
  • Internal SQA regression testing completed without encountering any new issues.
  • Latest patch fixes are incorporated.

The recommended Latest Feature Release is typically the newest software release. It contains the latest set of features and is fully supported; however, it does not yet have a history of evaluation in the field that is as extensive as the Maintenance Release. When using the Latest Feature release for a platform, upgrading to get fixes may require moving to the next major release that also contains new content.

Note: Before downloading software, review published Field Notices on the Extreme Portal.

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. Upgrades above these recommendations are suggested only to fix a specific known issue or to implement a required software feature not included in the currently recommended release.


PlatformMaintenance ReleaseLatest Feature ReleaseRecommendation Effective Date
_ExtremeCloud OrchestratorXCO 3.2.1XCO 3.2.12023101313-Oct-23
_SLX-OS on 8520SLX-OS 20.4.3bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on 8720SLX-OS 20.4.3bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on 8820SLX-OS 20.4.3bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on SLX 9140SLX-OS 18s.1.03gSLX-OS 18s.1.03g2023101313-Oct-23
_SLX-OS on SLX 9150SLX-OS 20.4.3bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on SLX 9240SLX-OS 18s.1.03gSLX-OS 18s.1.03g2023101313-Oct-23
_SLX-OS on SLX 9250SLX-OS 20.4.2bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on SLX 9540SLX-OS 20.4.3bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on SLX 9640SLX-OS 20.4.3bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on SLX 9740SLX-OS 20.4.3bSLX-OS 20.5.2a2023101313-Oct-23
_SLX-OS on SLX 9850SLX-OS 18r.1.00n SLX-OS 18r.1.00n 2023101313-Oct-23
_VDX 6740NOS 7.4.1hNOS 7.4.1h2024021414-Feb-24
_VDX 6940NOS 7.4.1hNOS 7.4.1h2024021414-Feb-24
_VDX 8770NOS 7.4.1hNOS 7.4.1h2024021414-Feb-24
MLX-ENI 6.3.00fNI 6.3.00f2023101313-Oct-23
CER-RTNI 6.3.00fNI 6.3.00f2023101313-Oct-23