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Connecting two LAN

By k4k ·
My company has two buildings. the first building has 128Kbps Internet Leased Line, Second building is located 4Km away from first building. we don't have any Internet Connection for second building.

Now my Director wants me to Link the LAN of Second building to the First building which 4km away.

1) How do i link these to LANs & provide the second building internet connection ??

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Connecting two LAN

by eBob In reply to Connecting two LAN

There are many ways to do this. One area that you will need to investigate is what offerings are available from your PTT.

But you're likely to find the optimal approach is to provision an Internet connection at your 2nd location, and connect your2 sites with VPN. This gives you Internet at both sites, and a secure connection between sites. How do you do VPN? Just provision a suitable pair of firewalls (I recommend Cisco PIX), and have your Cisco Gold partner help you set up the VPN.

One thing, you will likely want to upgrade that 128Kbps.

Another approach would be to try a traditional WAN solution. Depending on the size of the offices, and the amount of inter-office traffic this might be a couple of ISDN BRI, or a Frame/Relay link, or even a point-to-point leased line. Compare costs on these. You install a router in each site at the ends of this link. The router in your "head" office also connects to the Internet (again upgraded from 128K). In your "branch" office, all traffic not for the local LAN is routed over the inter-office link. At your "head" office, set up "gateway of last resort" out your firewall. And make sure there is a route back to your "branch" across the inter-office connection.

This latter solution is a "better" approach from the POV of managing Internet access policies, security, etc. It is likely to be more costly, however, than the VPN approach.

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Connecting two LAN

by k4k In reply to Connecting two LAN

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Connecting two LAN

by estebandelatorre In reply to Connecting two LAN

It all depends on traffic volumes...
1.- Connect 2nd office to internet and perform a VPN across internet, to join the two buildings. (ok for small number of users, say 10 with internet connection up to 128Kb, very low cost)
2.- Increase the B&W upon how many users you have. Up to when? see 3
3.- Make a Frame relay line between the two buildings (ideaaly for heavy traffic, lot's of files open, and make 2nd office, browse internet accros the wan fr link)

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Connecting two LAN

by k4k In reply to Connecting two LAN

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Connecting two LAN

by wlbowers In reply to Connecting two LAN

See if you have or can arrange a pair of telephone wires between the buildings. If you do or can throw in a couple of routers and you are there.

If you cannot do wiring check for line of site. There are laser and microwave links that are avaible. These are expensive on the front end but the cost of a lease line with the telephone company over time might offset the start up cost.

Good Luck Lee

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by k4k In reply to Connecting two LAN

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by k4k In reply to Connecting two LAN

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