BSNL EVDO

Many of us had concluded that bsnl evdo doesnt provide public ip and it works on shared ip of their gateway, whereas the facts are not the same. Each region has been given a set of ips(very small numbers), these ips are assigned on first come first serve basis.

For eg. Trivandrum BSNL confirms they have been given 63 ips as of now (more requested), from the 63rd user connecting to the trivandrum bsnl server, they are put on the shared ip 218.248.68.63.

For a techie guy this sounds a bluff, but last day I was forced to beleive its true. When the bsnl servers had issues and all connections got cut off. I kept on trying to get back on track. Infact I beleive I was one of the first ones to get connected. Surprisingly, when i was browsing sites, I noticed my ip was shown as 218.248.68.35 which was usually 218.248.68.63(the shared ip).  I confirmed my ip address from whatismyip.com. Then I went and checked windows > run > ipconfig /all command, but in the output it was the same 10.x.x.x ip. Still again to confirm, I went and opened a torrent port and few other services in my pc. Now i checked connecting to my pc on these services from a TATA Indicom connection. To my surprise it worked !!!. Again testing the next stuff was the vpn(pptp) which dint work in the shared ip. I tried connecting to office network and this time that too worked.

A small conclusion about ip allocation is, you get ips on first come first serve basis and also you dont get ips directly assigned to your pc when connected. When you get connected, you get ips of local range only. What happens is, they assign one static ip to forward all its connections to this local ip. In effective its like the same as u getting a public ip. So whenever you wish to find out whether you are getting a public ip, goto some site like whatismyip.com and check.
Again I had to disconnect and reconnect after sometim, then I was put back to the shared ip . What this confirms is, the very few ips allocated to these servers get assigned to users on first come first serve basis, rest of them have to be satisfied with limited services and shared ip. But this still sounds good news that by the time BSNL launch these services commercially, we would have enough ips to get going and these issues might get solved. A hope is seen…

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