I asked my son's dr in indonesia abt the brand he gave in 2months vaccine for DTP and Hib to my son he said GLAXO SMITH KLINE INFANRIX HIB. In india i asked for this brand they said we can give that as well. In india they give PENTAXIM for DTP-HIB combined vaccine.
I'd consider getting your son vaccinated in India, and then perhaps revaccinated later if you don't trust the effectiveness of the vaccine you got in India. You can run the brand of vaccine by your doctor at home and see what the doctor thinks of it.