I have an interpolation function which returns a list, e.g.:
f=Interpolation[{{1,{1,2,3}},{2,{4,5,6}}}];
When I try to plot it, I get single-colored curves.
Plot[f[x],{x,1,2}]

I'd like to make it use normal default different colors like here:
Plot[Evaluate@Table[2x+i,{i,0,2}],{x,1,2}]

But using Evaluate doesn't help in the first case as it does in the second. How can I get the colors for interpolation function?