https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21093#M1381 <P>Tried and same issue&nbsp;</P> <P>maybe I need different Tftp server?</P> <P>&nbsp;</P> Sat, 20 Jun 2020 01:46:00 GMT Darren567 2020-06-20T01:46:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21091#M1379 <P>i am trying with solar winds tftp and keep getting</P> <P>&nbsp;</P> <P>&nbsp;</P> <P><BR /> % Error accessing image file<BR /> 3524GT-PWR+(config)#download<BR /> Address [10.10.10.99] :<BR /> Filename [3500_539010] : 3500_5308_diag.bin<BR /> % Invalid image<BR /> 3524GT-PWR+(config)#dow<BR /> Address [10.10.10.99] :<BR /> Filename [3500_5308_diag.bin] : 3500_539010<BR /> % Error accessing image file<BR /> 3524GT-PWR+(config)#tftp 10.10.10.99<BR /> 3524GT-PWR+(config)#dow<BR /> Address [10.10.10.99] :<BR /> Filename [3500_539010] :<BR /> % Error accessing image file<BR /> 3524GT-PWR+(config)#<BR /> 3524GT-PWR+(config)#<BR /> 3524GT-PWR+(config)#<BR /> 3524GT-PWR+(config)#<BR /> 3524GT-PWR+(config)#<BR /> 3524GT-PWR+(config)#</P> Sat, 20 Jun 2020 00:54:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21091#M1379 Darren567 2020-06-20T00:54:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21092#M1380 <P>Try that…..</P> <P><A href="https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-upgrade-ERS-3500-switch" target="_blank" rel="nofollow noreferrer noopener">https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-upgrade-ERS-3500-switch</A></P> <P>&nbsp;</P> <P>-Ron</P> Sat, 20 Jun 2020 01:25:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21092#M1380 Ronald_Dvorak 2020-06-20T01:25:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21093#M1381 <P>Tried and same issue&nbsp;</P> <P>maybe I need different Tftp server?</P> <P>&nbsp;</P> Sat, 20 Jun 2020 01:46:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21093#M1381 Darren567 2020-06-20T01:46:00Z https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21094#M1382 <P>This was all due to trying to stack 2 ers switches and it not working&nbsp;</P> <P>&nbsp;</P> <P>&nbsp;</P> <P>&nbsp;</P> Sat, 20 Jun 2020 01:47:00 GMT https://community.extremenetworks.com/t5/extremeswitching-exos-switch/3500-switches-cannot-get-them-to-up-grade-stack/m-p/21094#M1382 Darren567 2020-06-20T01:47:00Z