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WAN setup using ISDN and TCP/IP

By info ·
We have a client with a main location/storefront and several satellite storefronts. For centralized accounting, invnetory and ordering purposes we are looking into linking all the satellite sites to the Netware network at the main location. DSL and Cable Modem service is not available at any of the locations yet.

I'm looking for conformation that ISDN is a good solution and some guidance with configuration.

I know an ISDN circuit from Verizon (Bell Atlantic) consists of two 64K channels which the ISDN router can handle separately. I invision a small peer-to-peer network at each satellite storefront (two to four workstations) with a Netopia router set up to use one channel to link to the main location and the 2nd channel to be available for shared internet access for the satellite storefront. The main location would have as many ISND circuits and equipment as needed to link one channel to each satellite storefront. The satellite routers would be set to dial into the main location on demand. My configuration question is in how TCP/IP addresses should be setup.

Would it work if we used the same subnet mask for all locations (255.255.255.0) and the same host address for all locations (192.168.1.xxx) and just ensure there is no duplication in addresses? Can it be this simple or will I need additional software, hardware or service solution to translate TCP/IP addresses across the WAN?

Can somebody suggest a better (cost effective) solution?

-Dave G.

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WAN setup using ISDN and TCP/IP

by liviu.gheorghe In reply to WAN setup using ISDN and ...

What you are trying to setup is a hub and spoke architecture, the central site is the hub and remote sites are spoke.
Using routers in all locations means assigning different IP subnets to all interfaces used.
You can use 192.168.1.xxx for hosts in the central site LAN, 192.168.2.xxx for the 1st remote site LANE, 192.168.3.xxx for the 3rd, etc.
You will have to assign IP address to the ISDN links as well. Use separate 192.168.xx.yy addresses for each link.
Next you will have to enable a routing protocol for IP in order to enable communication between remote LAN's and central site LAN.
I would suggest RIP ver 2 if you router supports it, but any other routing protocol would do the job.
For Internet access you must setup Network Address Translation on the routers that are used to access the Internet. This is necessary because of the 192.168.xxx.0 addresses which are for private use only (not routed in the Internet).
Hope it answers your question.

Liviu G.

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WAN setup using ISDN and TCP/IP

by info In reply to WAN setup using ISDN and ...

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WAN setup using ISDN and TCP/IP

by OTL In reply to WAN setup using ISDN and ...

You may want to check into Frame Relay the monthly charge stays the same, with the ISDN method the customer still has to pay minutes of useage and a monthly recurring charge for the line.

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WAN setup using ISDN and TCP/IP

by info In reply to WAN setup using ISDN and ...

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WAN setup using ISDN and TCP/IP

by burtsa In reply to WAN setup using ISDN and ...

I would agree with everything that the first post suggested except the routing protocol. I think that RIP has to much overhead. I would use something like EIGRP or OSRP. EIGRP I believe is a Cisco only protocol but OSRP is a something that most everyone supports.
RIP sends it's entire routing table every time. OSRP only sends the routing table when there is a change. It may not sound like much but it takes away bandwidth.
Another thing, I might use the whole 128K and set the router limit internet ports so you can get better performance for your network and still get internet to everyone.


Shawn

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WAN setup using ISDN and TCP/IP

by info In reply to WAN setup using ISDN and ...

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WAN setup using ISDN and TCP/IP

by info In reply to WAN setup using ISDN and ...

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