A technique for sharing a fabric to facilitate off-chip communication for on-chip units includes dynamically assigning a first unit that implements a first communication protocol to a first portion of the fabric when private fabrics are indicated for the on-chip units. The technique also includes dynamically assigning a second unit that implements a second communication protocol to a second portion of the fabric when the private fabrics are indicated for the on-chip units. In this case, the first and second units are integrated in a same chip and the first and second protocols are different. The technique further includes dynamically assigning, based on off-chip traffic requirements of the first and second units, the first unit or the second unit to the first and second portions of the fabric when the private fabrics are not indicated for the on-chip units.