Until 1.5.15b came out, our units for 11a Turbo links had to be on 1.4.22r and one on 1.3.23b. Links were not stable and troughput was not satisfactory.

Once we tested 1.5.15b on ALL units, everybody was very pleased how they perform so EVERY single unit was left to run on 1.5.15b without issues except for ACL. Those are X86-PC and X4000(mips) units.