using internet from two ISP in complex Lan network

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Gaurav naik

Reputable
Oct 29, 2014
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In my office I am having internet service from two isp's and very complex lan network( for non tech savvy person like me).
I want to use both isp's which are important for me as some websites are available only that perticular ISP.

Two isp's are
1)gbbn (state broad band network)
2)BSNL(usual ADSL modem router with 4-port lan )

Lan setup
1)CENTRAL SWITCH OF GBBN. (24 PORT) ONLY ONE PORT IS ALLOTED TO OUR OFFICE)

2)CS 1:
THIS ONE CABLE IS CONNECTED TO 8 PORT LAN SWITCH (CS-1) ON WHICH FURTHER 2 LAN SWITCHES (CS-3)AND(CS-4) ARE CONNECTED ALONG WITH 1 PRINTER AND 4 PC'S

3)CS 3
Connected to 6 PCs

4)CS 4
Connected to 6 PCs and looped to adsl router.

5)ADSL router with 4 lan ports
connected to 3 PCs and CS 4

Now my requirement is to use internet of desiered ISP anywhere on any PC of this complex network (cs-1,CS-3,CS-4,ADSL modem) with click of button or change of IPV4 settings.

I am sure it is possible but just want know from you guys how?
Please help me friends.
 
Solution
Fozzie Bear


Hi, A lot of what you can do depends on how much control you have over the network. Do you have authority to purchase and change routers and make other changes to the network?

If you do then there are ways to achieve certain things. Firstly how do your two ISPs present their connections. One (BSNL) appears to be standard ADSL (although I don't know if this is Annex A or B in your country) What about...
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Alabalcho

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Jan 13, 2011
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This is not an easy task for non-techie. Cisco RV042 is an example of "Dual-wan" router. This is not a router where you point a browser and configure with a mouse, you need knowledge of Cisco' IOS (so you can, for example, direct a web site thru particular ISP).

Another option is to build a PC with three network ports, install Linux, and start learning "iptables".
 
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Fozzie Bear

Fozzie Bear

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Jan 11, 2013
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Hi, A lot of what you can do depends on how much control you have over the network. Do you have authority to purchase and change routers and make other changes to the network?

If you do then there are ways to achieve certain things. Firstly how do your two ISPs present their connections. One (BSNL) appears to be standard ADSL (although I don't know if this is Annex A or B in your country) What about GBBN is this also ADSL or is it cable, fibre or ethernet? If cable Fibre or Ethernet then you can easily use a Dual Wan router like Draytek 2830 or Billion BiPAC 7800N or similar. Your BSNL can connect to the normal Wan 1 ADSL port and the GBBN to Wan 2 ethernet port. I am not familiar with the Billion setup but the Draytek allows you to control which traffic goes via which Internet connection. Unlike Cisco there are some good guides on setting up a Draytek router for load balancing and traffic shaping. As Alabalco says the alternative is to build a Linux based firewall router using Smoothwall or pfSense which would give you a lot more control. You only need an old PC and a few PCI NIC cards and download the live distro.

Fozzie
 
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