  In this note, we construct bipartite 2-walk-regular graphs with exactly 6
distinct eigenvalues as incidence graphs of group-divisible designs with the
dual property. For many of them, we show that they are 2-arc-transitive
dihedrants. We note that many of these graphs are not described in Du et al.
[7, Theorem1.2], in which they classify the connected 2-arc transitive
dihedrants.
