You would need to arrange for your visa in advance. Note that, within the link, there is reference to visa exempt countries. At #19, India, exemption is made only for those who bear Diplomatic and Official passports, not for Ordinary passport holders.
Socialist Republic of Viet Nam Government Portal
Most visitors to Việt Nam need a visa to enter the country. Visas are exempted for the citizens of the countries, which have signed a bilateral or unilateral visa exemption* agreement with Việt Nam, tourist visa may be valid for 15 to 30 days.
Tourist visa can only be obtained in Vietnamese embassies, consulates abroad. Otherwise, you can get a visa at the border gates if you are invitees of some Vietnamese competent organs or you are travelling on a package tour organized by Vietnamese travel companies. To apply for a visa, the requirements are as follows:
- Entry permit form (which can vary from one Vietnamese embassies or consulate abroad to another) - There are two categories of this form: for foreigners and for Vietnamese overseas.
- Two photos (4cmx6cm or 3cmx4cm)
- Original passport
- Visa fee.
You should send your application and photos to a Vietnamese embassy or consulate abroad, which is most convenient to you. On your requirement, the reply will be returned by post (you must provide stamped envelopes with your name and address).
It is easier to get your visa from a Vietnamese travel agency. The necessary information to the travel agency include:
- Full name
- Birthday and place of birth
- Number of your passport
- Entry and exit dates
- Country you plan to receive your entry visa from the Vietnamese embassies or consulates
Vietnamese Embassy/Consulate India
Address: No. 17 Kantilya Marg, Chanakyapari, New Dehli 110021
Tel: (91-11) 301859, 3017714
Fax: (91-11) 3017714