https://community.extremenetworks.com/t5/extremeswitching-exos-switch/source-ip-lockdown-failed/m-p/43574#M10537 What specific errors are you seeing in the logs? Mon, 10 Jul 2017 18:21:00 GMT Kawawa 2017-07-10T18:21:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/source-ip-lockdown-failed/m-p/43573#M10536 My company have more than 500 x150,x250 and x350, When that switch firmware is 12.x all source-ip-lockdown function was normal, but when I upgrad to 15.x then all source-ip-lockdown will fail Mon, 10 Jul 2017 17:32:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/source-ip-lockdown-failed/m-p/43573#M10536 Li_Ping_Hsu 2017-07-10T17:32:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/source-ip-lockdown-failed/m-p/43574#M10537 What specific errors are you seeing in the logs? Mon, 10 Jul 2017 18:21:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/source-ip-lockdown-failed/m-p/43574#M10537 Kawawa 2017-07-10T18:21:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/source-ip-lockdown-failed/m-p/43575#M10538 Hello Li Ping,<BR /> Hello,<BR /> <BR /> Please refer to the GTAC knowledge article below in regards to your issue:<BR /> <BR /> How to contact Extreme Networks Global Technical Assistance Center (GTAC)<BR /> <A href="https://extremeportal.force.com/ExtrArticleDetail?n=000001818" target="_blank" rel="nofollow noreferrer noopener">https://extremeportal.force.com/ExtrArticleDetail?n=000001818</A><BR /> <BR /> Best regards,<BR /> Bin Tue, 11 Jul 2017 04:53:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/source-ip-lockdown-failed/m-p/43575#M10538 Bin 2017-07-11T04:53:00Z