Watch the Example 22 online guitar lesson by Brad Carlton from Guitar Lab: Boogie-Woogie
Now the mixolydian harmony becomes vague. The chords are Asus2 sus4, Dmaj9/A, A7/6sus4 then back to Dmaj9/A. You may not be able to use this example but it is worthwhile for viewing close voiced structures on the fingerboard. This example also has more of that 3 to sus4 motion occuring.