Thread: problem sharing internet. using bsnl wa3002g4 modem

hi,

i m having problem in sharing internet n bring few machines in LAN.

i have tried the 'always on connection' in WA3002G4 but it doesnt work so i have kept it in bridge mode n its working fine. i have encountered the same problem in one more site. i am a hardware engg n started with networking too but since the bsnl guys don't provide much of a service i have to manage the bsnl connection.

pictorial attachment added for

1.what i did for always on connection.
2.for what i did for bridge mode. internet works fine in bridge mode.
3.LAN settings in 'Advanced Setup' option in router.
4.sharing of internet
5.ip address of machine from which internet is shared.

the setup is like this.

3 eth port of modem are connected to 3 pc. one eth port is used to link a simple switch. this switch has 3 pc's attached to its port.

one of the pc attached to eth port of dataone is used to connect to internet via pppoe dialer because its on bridge as I've told before. when this connects rest 2 pc's attached to eth port connects via dhcp.

the pc having pppoer dialer is having ip of 192.168.0.1 as its in sharing mode. while enabling sharing mode it warns 'ip address of local m/c will be change to 192.168.0.1 by default & repair connection of other attached pc's so that it can acquire new dhcp address' (something like that)

by doing this all 3 pc's comes in one network with internet-on on all three of them.

now the thing is the 3 pc's which are connected to switch r not able to get ip address from dhcp. while trying to acquire ip in from dhcp it acquires apipa address of 169. range.

another thing is when assigning ip manually in the range of 192.168.0.x with gateway,dns & all it doesn't ping the 3 mc's which are having same ip range. give 'request time out' error. i have check recheck everything related to ip n everything is correct. i m bewildered why its not coming in lan & not getting internet on it. firewall is completely disabled. all pc's have xp in them.

please guide. is this to anything with adsl configuration? hardware wise everything is perfect in fact previously before there lan crashed just by activating bridge mode & enabling internet sharing everything worked fine.no manual inputs were give. all m/c's acquired ip from dhcp n net was shared.

please help guys. i have to get it done anyhow tomorrow, bring rest 3 pc's in LAN. i m visiting his office morning at 10am. that pencho is making me work like a slave

regards,
baaaaahahaha

if any more info is required pls ask for it.

May be this will be useful

http://www.indiabroadband.net/broadb...onnection.html (Solution for multiple machines connecting to same BB connection)

hmm have gone through the 'how to' most of the things i have done. will try changing ip scheme to 192.168.1.x for all pc's. hope sharing works. but why it changes the ip of pc's to 192.168.0.x scheme when sharing is enabled? also allots dhcp addresses in the same range where as the dhcp range in modem when i checked was from 192.168.1.3 to 192.168.1.1.253.


can we use any other adsl modem instead of the one provided by bsnl? is yes then which one?

Assigning static IP will ensure the identification of each PC as an individual.

You can use any ADSL modem there is no issue of it, D-Link is a good choice, search some posts about modem here, you will get good list and with its features.

thank you all who posted. everything is in place now n working fine.

Bad



Am late here

As am having a connection in my home itself which i set up 3 yrs before. Even i encountered same problem the TS had.

But made it successfully.

Any way..Good luck for your new network!!

you have only 1 eth card , how are you setting up ICS?

Originally Posted by superprash2003

you have only 1 eth card , how are you setting up ICS?

hmm i guess the connected WAN miniport will act as one logical NIC ? The modem could it self act as a switch since all other Pc's are connected to it, they can get ip address from the machine on which ICS is enabled. any thoughts on this ?

Originally Posted by harishsyndrome

Bad



Am late here

As am having a connection in my home itself which i set up 3 yrs before. Even i encountered same problem the TS had.

But made it successfully.

Any way..Good luck for your new network!!

i tried connecting the 1 of the pc's which were not in network to adsl modem n they worked fine & did the same with rest of the 2 they all worked fine so that fault was with switch...it got damaged i don't know how but i figured it was so change the switch & everything was OK.

Originally Posted by superprash2003

you have only 1 eth card , how are you setting up ICS?

adsl creates a virtual adapter while connecting to internet so the physical one acts as ur 2nd nic n hence ics gets enabled on the virtual adapter. i don't know if u noticed but it shows two icons in task bar icons, one is virtual other one is that on ur nic

@baaa
Even though this configuration works for you i think you should consider a different networking scenario pal, I think this configuration will create unnecessary traffic between the modem and the ICS enabled system.
Consider a scenario when a PC connected to switch need to connect to internet. The request will first go to the switch, from switch it goes to the modem, then from modem to ICS enabled machine and again from ICS enabled machine back to modem via PPP and at last to the BSNL sever. You are increasing the network latency. May be its not big deal with only 6 pcs...

is your modem connected via USB?

Originally Posted by harisk

@baaa
Even though this configuration works for you i think you should consider a different networking scenario pal, I think this configuration will create unnecessary traffic between the modem and the ICS enabled system.
Consider a scenario when a PC connected to switch need to connect to internet. The request will first go to the switch, from switch it goes to the modem, then from modem to ICS enabled machine and again from ICS enabled machine back to modem via PPP and at last to the BSNL sever. You are increasing the network latency. May be its not big deal with only 6 pcs...

hmmm true!! what'll be a good layout for all then? wont change it for 6pc's as they r getting good speed. but just in case i come across a bigger network say of 20 pc's then it'll come handy while making the network layout.

by the way thats the only was we can share a single connection isnt it? or there r anymore? switch has to come in picture when adding more than one pc n getting internet shared on connected pcs.

Originally Posted by superprash2003

is your modem connected via USB?

no.

i'm sorry , i still didnt understand.. how many PHYSICAL LAN ports do you have in your machine?

@superprash 2003

seems thread starter's problem solved.

From Post No 6 by @baaa

thank you all who posted. everything is in place now n working fine.

@baaa
I would recommend to add an additional NIC to the ICS enabled machine and connect this NIC with the switch. All the other pc's will be connected to the switch. In this way there will be less latency.

Otherwise you could configure PPPOE in the modem itself, all machines (and switch) could directly connect to the modem and access internet. This configuration would have the least latency in my opinion.

@Baa. This forum is a descent forum(except the spamming)

whatever you wrote about yourself in introductions was spookier.
you should never repeat this again..

hope to see you posting.

Regards

Mickey.

Originally Posted by harisk

@baaa
I would recommend to add an additional NIC to the ICS enabled machine and connect this NIC with the switch. All the other pc's will be connected to the switch. In this way there will be less latency.

Otherwise you could configure PPPOE in the modem itself, all machines (and switch) could directly connect to the modem and access internet. This configuration would have the least latency in my opinion.

@ harisk
cancel out the pppoe option it doesn't work no matter how many time i configure it. so switched it to bridge which work always. faced same problem in 3 other offices n switched to bridge its working fine.maybe bsnl modem become faulty after months of usage.

one nic goes to modem & other goes to switch right?
good option does shortens the path
cant try it out as its a developers office n a few hrs of hang up worries them.

tnx u harisk will keep it as an option next time on. :thumbup1:

yea but i would still like to know how the person got ICS working with 1 LAN card and without using USB..

Originally Posted by superprash2003

yea but i would still like to know how the person got ICS working with 1 LAN card and without using USB..

see post number 9

well according to that only one pc will get internet access.. ICS requires 2 LAN cards , i dont see how it worked..would like to know though..

There exist two adapters in that machine. one WAN miniport virtual adapter and the physical NIC that he has installed on the machine. He enabled internet sharing on WAN adapter. since there exists only one physical NIC windows made it the shared LAN (Thats why he got message ip address of local m/c will be change to 192.168.0.1).If there were more than one adapters, ICS tab page will have a combo box which lists adapter names for which internet should be shared.
Coming back to your doubt... Now what you need to understand is that now there exist 2 networks in between the modem and the machine. One is PPPOE based another one is IP based (192.168.0.XXX). these are entirely different networks. PPPOE protocal donot communicate with IP address. If you dont believe me try resetting IP of your computer (DONT DISABLE ADAPTER), so that it displays limited connectivity warning (No IP assigned), then double click the PPPOE dialer. You can see that the WAN adapter connects to BSNL server even though your physical LAN adapter has no IP/automatic private ip(169.x.x.x).
The modem which has more than one ethernet port behaves like a switch. Here the physical NIC on the machine is connected to the modem (NIC with IP 192.168.0.1). Since modem behaves like a switch, all connected PC's can "see" this IP. So if i set an IP (192.168.1.2)for one of the other machine and give gateway as 192.168.0.1, he can find the ICS.

hope you understood ....

oih ok.. interesting.. nice . would love to try that out home..thanks for explaining..