https://community.extremenetworks.com/t5/extremeswitching-exos-switch/xos-firmware-upgrade/m-p/45619#M11407 Hi Karina,<BR /> Take a look at this thread: <A href="https://community.extremenetworks.com/extreme/topics/what-is-the-newest-firmware-version-for-the-blackdiamond-8810" target="_blank" rel="nofollow noreferrer noopener">https://community.extremenetworks.com/extreme/topics/what-is-the-newest-firmware-version-for-the-bla...</A><BR /> And this article: <A href="https://gtacknowledge.extremenetworks.com/articles/Q_A/What-Is-The-Recommended-Release-of-EXOS-For-My-Platform" target="_blank" rel="nofollow noreferrer noopener">https://gtacknowledge.extremenetworks.com/articles/Q_A/What-Is-The-Recommended-Release-of-EXOS-For-M...</A><BR /> The information there is more specific to the 8800 series, but the concepts still apply to all EXOS products.<BR /> <BR /> Regarding the "<A href="http://documentation.extremenetworks.com/hw_sw_compatibility/HardwareSoftwareCompatibility/r_recommendations.shtml" target="_blank" rel="nofollow noreferrer noopener">recommended release</A>" document, keep the following in mind.<BR /> Generally speaking, ExtremeXOS software version recommendations are based on the following criteria:<BR /> <UL> <LI>Recommended releases should have no open critical issues introduced in the respective version </LI><LI>Recommended releases should have been deployed in field for at least 3 months. As an exception, the latest release would be recommended if critical fixes affecting existing deployment were added to the release. </LI><LI>Internal SQA testing must be completed without encountering any new issues </LI><LI>Recommended releases should have been reviewed and accepted by Engineering Team Leads</LI></UL>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 ExtremeXOS feature not included in the currently recommended release.<BR /> <BR /> If you've got questions or want further advice, let us know!<BR /> <BR /> Thanks,<BR /> -Drew Thu, 03 Dec 2015 01:32:00 GMT Drew_C 2015-12-03T01:32:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/xos-firmware-upgrade/m-p/45618#M11406 Hi, We do most of our maintenance end of the year, and I going to upgrade the firmware on the switches, and Core, they are currently running Xos 12.5.4.5 and have a couple of new summits stack on 15.7.1.4, what will you recommend upgrade all of XoS to 15.7.1.4 or "jump" all of them to 16.1.2?<BR /> <BR /> Thanks<BR /> <BR /> p.s. I don't have a lot of maintenance windows during the year Thu, 03 Dec 2015 01:26:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/xos-firmware-upgrade/m-p/45618#M11406 Kar_Del_Moral 2015-12-03T01:26:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/xos-firmware-upgrade/m-p/45619#M11407 Hi Karina,<BR /> Take a look at this thread: <A href="https://community.extremenetworks.com/extreme/topics/what-is-the-newest-firmware-version-for-the-blackdiamond-8810" target="_blank" rel="nofollow noreferrer noopener">https://community.extremenetworks.com/extreme/topics/what-is-the-newest-firmware-version-for-the-bla...</A><BR /> And this article: <A href="https://gtacknowledge.extremenetworks.com/articles/Q_A/What-Is-The-Recommended-Release-of-EXOS-For-My-Platform" target="_blank" rel="nofollow noreferrer noopener">https://gtacknowledge.extremenetworks.com/articles/Q_A/What-Is-The-Recommended-Release-of-EXOS-For-M...</A><BR /> The information there is more specific to the 8800 series, but the concepts still apply to all EXOS products.<BR /> <BR /> Regarding the "<A href="http://documentation.extremenetworks.com/hw_sw_compatibility/HardwareSoftwareCompatibility/r_recommendations.shtml" target="_blank" rel="nofollow noreferrer noopener">recommended release</A>" document, keep the following in mind.<BR /> Generally speaking, ExtremeXOS software version recommendations are based on the following criteria:<BR /> <UL> <LI>Recommended releases should have no open critical issues introduced in the respective version </LI><LI>Recommended releases should have been deployed in field for at least 3 months. As an exception, the latest release would be recommended if critical fixes affecting existing deployment were added to the release. </LI><LI>Internal SQA testing must be completed without encountering any new issues </LI><LI>Recommended releases should have been reviewed and accepted by Engineering Team Leads</LI></UL>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 ExtremeXOS feature not included in the currently recommended release.<BR /> <BR /> If you've got questions or want further advice, let us know!<BR /> <BR /> Thanks,<BR /> -Drew Thu, 03 Dec 2015 01:32:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/xos-firmware-upgrade/m-p/45619#M11407 Drew_C 2015-12-03T01:32:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/xos-firmware-upgrade/m-p/45620#M11408 Thanks Drew!! Thu, 03 Dec 2015 01:32:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/xos-firmware-upgrade/m-p/45620#M11408 Kar_Del_Moral 2015-12-03T01:32:00Z