On VyOS 1.3 rolling,
The ping command fails when 'interface' arguemnt is given:
vyos@vyos-vm-2:~$ ping 10.2.1.1 interface 10.2.6.21 /bin/ping: invalid option -- 'I' Try 'ping --help' or 'ping --usage' for more information. vyos@vyos-vm-2:~$ ping 10.2.1.1 interface dum0 /bin/ping: invalid option -- 'I' Try 'ping --help' or 'ping --usage' for more information.
The cause of this is that the "-I" switch is not included/supported in the version of ping shipped with vyos-1.3 (inetutils-ping) whereas 1.2.x was using iputils-ping. The ability to specify source interface / address is very important for most network administrators so this is a noticeable problem.