Doncaster scored a goal in each half to stun Championship high-flyers Ipswich in their Carling Cup tie.
Ricky Ravenhill netted after just six minutes, side-footing home after Leo Fortune-West's headed into his path.
Fortune-West and Guy Ipoua then had half-chances, although Ipswich's Jim Magilton forced a fine save from home keeper Andy Warrington.
Jermaine McSporran sealed the win after the break, blasting a superb volley home early into the second half.
Doncaster: Warrington, Fenton, Albrighton, Foster, Priet, McSporran (Mulligan 81), Doolan, Ravenhill (Green 90), McIndoe, Fortune-West, Ipoua (Coppinger 90).
Subs Not Used: Jones, Beardsley.
Goals: Ravenhill 6, McSporran 46.
Ipswich: Price, Diallo, Naylor, De Vos, Richards, Dinning,
Magilton, Westlake, Bent, Counago (Kuqi 65),
Bowditch (Miller 45).
Subs Not Used: Davis, Wilnis, Mitchell.
Ref: L Mason (Lancashire).