https://community.cisco.com/t5/wireless/tftp-is-slow-in-3850/m-p/2428924#M139059 <P><SPAN style="font-size: small;"><STRONG><SPAN style="color: #ff00ff; font-family: arial black,avant garde;">By default, the Catalyst 3850 uses a tftp block size value of 512, which is the lowest possible value.&nbsp; The reasoning behind this default value is to ensure interoperability with legacy tftp servers.</SPAN></STRONG></SPAN></P><P><SPAN style="font-size: small;"><STRONG><SPAN style="font-family: arial black,avant garde;"><SPAN style="color: #ff00ff;">For IOS-XE version 3.3.2 and below, you will have to manually change the block size in the global configuration to speed up the transfer process.&nbsp; The example below is a transfer comparison when using the default block size of 512K versus a transfer using the maximum block size value of 8192K.</SPAN></SPAN></STRONG></SPAN></P><P class="ui-widget"><SPAN style="font-size: small;"><SPAN style="font-family: arial black,avant garde;"><SPAN style="color: #ff00ff;"><SPAN style="color: #00ffff;">ip tftp blocksize 8192</SPAN></SPAN></SPAN></SPAN></P> Fri, 04 Apr 2014 06:36:40 GMT SHIBI V DEV 2014-04-04T06:36:40Z https://community.cisco.com/t5/wireless/tftp-is-slow-in-3850/m-p/2428923#M139058 <P><STRONG><SPAN style="font-size: medium;">I am copying IOS file to 3850 Using TFTP and it is taking long time and i tried with different TFTP servers and different operating systems.</SPAN> </STRONG></P> Mon, 05 Jul 2021 07:37:01 GMT https://community.cisco.com/t5/wireless/tftp-is-slow-in-3850/m-p/2428923#M139058 Srihari V 2021-07-05T07:37:01Z https://community.cisco.com/t5/wireless/tftp-is-slow-in-3850/m-p/2428924#M139059 <P><SPAN style="font-size: small;"><STRONG><SPAN style="color: #ff00ff; font-family: arial black,avant garde;">By default, the Catalyst 3850 uses a tftp block size value of 512, which is the lowest possible value.&nbsp; The reasoning behind this default value is to ensure interoperability with legacy tftp servers.</SPAN></STRONG></SPAN></P><P><SPAN style="font-size: small;"><STRONG><SPAN style="font-family: arial black,avant garde;"><SPAN style="color: #ff00ff;">For IOS-XE version 3.3.2 and below, you will have to manually change the block size in the global configuration to speed up the transfer process.&nbsp; The example below is a transfer comparison when using the default block size of 512K versus a transfer using the maximum block size value of 8192K.</SPAN></SPAN></STRONG></SPAN></P><P class="ui-widget"><SPAN style="font-size: small;"><SPAN style="font-family: arial black,avant garde;"><SPAN style="color: #ff00ff;"><SPAN style="color: #00ffff;">ip tftp blocksize 8192</SPAN></SPAN></SPAN></SPAN></P> Fri, 04 Apr 2014 06:36:40 GMT https://community.cisco.com/t5/wireless/tftp-is-slow-in-3850/m-p/2428924#M139059 SHIBI V DEV 2014-04-04T06:36:40Z