Involved in the assembly of the O-repeating unit during O-antigen biosynthesis. beta-D-Gal-(1->3)-alpha-D-GalNAc-(1->3)-alpha-D-GalNAc-di-trans,octa-cis-undecaprenyl diphosphate + GDP-beta-L-fucose = alpha-L-Fuc-(1->2)-beta-D-Gal-(1->3)-alpha-D-GalNAc-(1->3)-alpha-D-GalNAc-di-trans,octa-cis-undecaprenyl diphosphate + GDP + H(+) Bacterial outer membrane biogenesis; LPS O-antigen biosynthesis. O86:H2 and O86:B7 subtypes share the same O unit, but the O units are polymerized from different terminal sugars in different glycosidic linkages. Belongs to the glycosyltransferase 11 family.