In the long run, India needs to be able to project power into the South China Sea to make sure India can pose a threat to interrupt China's trade.
For that, India also needs a diplomatic offensive to gain the friendship of Thailand, Malyasia, Indonesia,Vietnam, the Philippines, and Taiwan. Alliance with America, Japan, South Korea, and Australia wouldn't hurt, of course.
So I imagine we could expect more of this:
In a sign of the new significance that India is attaching to its ties with Southeast Asia, India hosted Indonesian President Susilo Bambang Yudhoyono at its Republic Day celebrations this year.
Each side will have intense interest in waging a cold war for the allegiance of the region's states.
UPDATE: I forgot about an earlier post where I noted that India has gained access to Vietnamese ports.