Hi Harm,
thanks for the suggestion. I have this set in my .config file for the compilation of u-boot: CONFIG_TFTP_BLOCKSIZE=1468 CONFIG_TFTP_WINDOWSIZE=1 I'm also using a custom boot.cmd file... should I instead just put your vars in it like this: tftpblocksize=512 tftptimeout=10000 or like this: setenv tftpblocksize 512 setenv tftptimeout 10000 ? I'm still new to u-boot even though I could make it do exactly what I needed... extremely useful to boot my cluster of raspberry pis 4 b with individual kernel options each. PS: Any good book around on u-boot? Good doc seems so difficult to get. Thank you! ________________________________ From: Harm Berntsen <harm.bernt...@nedap.com> Sent: Tuesday, September 7, 2021 10:12:45 AM To: Matteo Guglielmi Cc: u-boot@lists.denx.de Subject: Re: tftp time outs Hi Matteo, Which version of U-Boot are you using? Try setting the following environment variables: tftpblocksize=512 tftptimeout=10000 -- Harm -----Original Message----- From: Matteo Guglielmi <matteo.guglie...@dalco.ch> To: u-boot@lists.denx.de <u-boot@lists.denx.de> Subject: tftp time outs Date: Sun, 05 Sep 2021 13:49:46 +0000 Dear All, I've noticed that when u-boot is downloading files from a tftp server (e.g. vmlinuz, initrd etc.) it starts to time out quite heavily "##T #T #T..." if I simply ping the NIC of the raspberry 4b on which it's running. Thanks for any comment or suggestion on this behavior.