"I am more and more inclined towards a mandate" requiring Australian government agencies to adopt IPv6, Clark said.

An IPv6 mandate in the US ordered by the nation's former CIO Vivek Kundra went into effect on 30 September. It requires all federal government agencies to make all public websites and email available on IPv6.

Even with a mandate, US agencies are still far from 100 per cent IPv6 enabled, according to dated 4 October. The chart shows that only about 20 per cent of domains have IPv6 enabled for Web. However, industry observers .

Clark said it's "extremely important" to the IPv6 transition that government agencies commit to the new addressing scheme.

"With government adopting and providing services over IPv6 you more quickly get to economies of scale," she said.