A Melbourne court has sentenced an Australian to over six years in jail for attacking an Indian taxi driver with a knife -- an incident that led to hundreds of Indian cabbies blocking the city streets last year. Justice Elizabeth Curtain sentenced Parrish Chales to six-and-a-half years in jail, saying the stabbing was 'random, unprovoked and frenzied' and the fact that the 45-year-old attacker had a hunting knife hidden in his pants showed a degree of 'premeditation'.