Configuring linksys router with sify broadband or bsnl connection

I have chosen sify and bsnl because one is dsl and other adsl. So, you can follow similar steps if you have any other broadband connection.

For bsnl connection -

Prerequisites :

1. You need to have working bsnl connection with an adsl modem i.e. the connection will be something like this, PC <---> ADSL modem <---> BSNL connection.

Steps you need to take to configure the router :

1. First note your ip and default gateway address.
2. Next reset your ip and dns info ( in windows you can do this by selecting the option get ip address automatically, instead of manually entering the ip addresses ).
3. Now disconnect your pc from the adsl modem.
4. Connect your pc to the router i.e. one of the four lan ports ( not the blue port ) of the router.
5. now type http://192.168.1.1 in your browser. Goto setup and set the configuration of router to static ip ( you will have three options dhcp, static ip or pppoe ).
6. There you will have two parts, internet setup and network setup. Internet setup is the config between router and adsl modem, whereas the network setup is the config between router and pc. For your pc, router is the default gateway and for your router, adsl modem is the default gateway.
7. In the internet setup part, set the ip, subnet mask, default gateway and your dns addresses to the original configuration which you were using in your pc with only the adsl modem.
8. Now go to the network setup part and set your ip as some other subnet other than the internet ip you just set. In my case the internet ip is 192.168.1.38 and my local ip address is 192.168.2.1 - notice that they are in different subnets, since subnet mask is 255.255.255.0 - you will need to make changes accordingly. By default you will have your local ip address set to 192.168.1.1 but since your adsl modem has that as its address you can't set the same address to this and thus you need to change it to 192.168.2.1. Now your pc, phone or laptops will get the address of the form 192.168.2.xx
9. Now connect your router's blue port to your adsl modem.
10. Now enable dhcp in your router ( it usually will be enabled by default ). If you don't enable WEP, it will crib for the first time. So, configure it.
11. Thats it you have now setup a local lan. I am using my ip phone, my pc and my laptop simultaneously.

Sify Broadband -

Prerequisites :

1. You will need to have a working connection of sify ( the network cable ) given by them and the connection using the client should be working properly.

Steps to setup the router :

1. you will take the same steps as before i.e first note your ip, gateway, dns addresses.
2. next remove all your existing ip config of your pc.
3. Now connect your router to your pc.
4. All the steps are same, you select static ip and configure the network and internet parts. If the ip given to you by sify is of the form 10.xx.xx.xx then you don't need to change anything on the local ip address part of the router.
5. In the static ip configuration page of your router there will be an option called PPPoE passthrough. It will be disabled by default, you need to enable it.
6. Next connect the sify cable to the blue port of your router and pc to any one of the 4 lan ports.
7. Now run the sify client from the pc and connect to the internet. You are now up and running.
8. Wait forgot to tell you the main part, in sify they bind the username and password with your mac address, so you got to call your sify provider and tell him to change the mac address from your pc to that of your router.
9. If you login to your account using the client from your pc, you will be able to connect to internet without any hassles from other devices connected throught the router i.e. the ip phone, or laptops etc.

If you feel that anything more can be added to this please leave a comment. Hope this helps.