In a large bowl, cream butter and sugar until light and fluffy, 5-7 minutes. Beat in eggs and vanilla. Combine the dry ingredients; add to the creamed mixture alternately with bananas, beating well after each addition. Spread into a greased 13x9-in. baking pan. Top with cranberry sauce., In a small bowl, combine the brown sugar, pecans and flour; stir in butter. Sprinkle over cranberries. Bake at 350° for 45-50 minutes or until a toothpick inserted in the center comes out clean. Cool in pan on a wire rack.