https://community.extremenetworks.com/t5/extremeswitching-other/is-the-x440-in-a-stack-capable-of-rolling-upgrade/m-p/10209#M1237 Is the x440 in a stack capable of rolling upgrade? I thought of connecting the firewall using portchannel from different chassis. Customer requires software maintenance without service interruption - even no interruption of calls in progress. Wed, 15 Aug 2018 18:46:00 GMT Jenson 2018-08-15T18:46:00Z https://community.extremenetworks.com/t5/extremeswitching-other/is-the-x440-in-a-stack-capable-of-rolling-upgrade/m-p/10209#M1237 Is the x440 in a stack capable of rolling upgrade? I thought of connecting the firewall using portchannel from different chassis. Customer requires software maintenance without service interruption - even no interruption of calls in progress. Wed, 15 Aug 2018 18:46:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/is-the-x440-in-a-stack-capable-of-rolling-upgrade/m-p/10209#M1237 Jenson 2018-08-15T18:46:00Z https://community.extremenetworks.com/t5/extremeswitching-other/is-the-x440-in-a-stack-capable-of-rolling-upgrade/m-p/10210#M1238 Unfortunately, no. You'll have to move to Mlag instead. Wed, 15 Aug 2018 18:51:00 GMT https://community.extremenetworks.com/t5/extremeswitching-other/is-the-x440-in-a-stack-capable-of-rolling-upgrade/m-p/10210#M1238 Eric_Burke 2018-08-15T18:51:00Z