Recently with the move to 7.21 there were quite a few threads on the forum (examples 1, 2, 3)where people were taken by surprise by the lack of the ability to specify the interface and VRF in tools like :ping and /tool traceroute, due to the change:
where the choices are expected to be manually embedded into the destination address as address@vrf%interface, with no GUI assistance in WinBox other than a plain textbox.
But it doesn't have to be like that, in fact there is another place in RouterOS that expects the syntax address%interface:
Where WinBox has good GUI support, both in WinBox 3:
and 4beta:
Could you please incorporate the same mechanism (with an additional dropdown control after @ to specify the VRF) in "Bandwidth test, Speed test, Ping, Traceroute tools"!