I got H1B extension approval for 3 years in January 2017.I have vacation plan in Feb 2017, meanwhile I have stamping interview on 27th and 28th Feb 2017 in Mumbai. Will it be okay to travel and attend interview?
I would suggest waiting for new administrative rulings to finalize before travel. In the next few months, the chances of triggering an RFE are very high as most officials will want to delay a decision. Please wait for final rulings before making travel plans.