Getting masters from a top institute in India, even with somewhat low grades, does not reflect negatively on your chances to get enrolled for Ph.D. In fact, most top research institutes in India give preference to students who did their masters degree from an institute of similar repute during Ph.D. admissions. So, if you are aiming for Ph.D., then it is in your best interests to continue your masters from a top/reputable institute.

Getting masters from a top institute in India, even with somewhat low grades, does not reflect negatively on your chances to get enrolled for Ph.D. In fact, most top research institutes in India give preference to students who did their masters degree from an institute of similar repute during Ph.D. admissions. So, if you are aiming for Ph.D., then it is in your best interests to continue your masters from a top/reputed institute.