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Questions about Point-to-Point T-1 connection into network

Posted on 2004-11-23
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Last Modified: 2010-04-10
I have a few questions about a point-to-point T-1 connection between offices and how it ties into the existing network.  This is the current config:

Office 1:
This office currently has a DSL connection for Internet access.  From the DSL jack on the wall is plugged into the internet port of a Netgear FVS318 Firewall/VPN router.  Then everything else is plugged into the router (i.e. servers, workstations, switches, etc.) The Domain controller is located at this office.

Office 2:
This office has DSL for Internet access also.  It is connected the same way - DSL jack to the Internet port on a Netgear FVS318 Firewall/VPN router.  A VPN tunnel is established from this router to the Office 1 router, so users can access network resources, etc.

Now this is where I'm totally lost.  We are getting a point-to-point T-1 line and they are not supplying the routers.  My questions are: How exactly is the point-to-point connection tied in?  Do I need to get different routers and recreate another VPN tunnel?  Or how am I connected to the other office with this point-to-point T-1 line?  I'm not sure how the integration of this point-to-point T-1 line will change the topology of the network.




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Question by:jplagens
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lrmoore earned 2000 total points
ID: 12660355
The topology will change drastically
You'll end up with something like this:
Offic1
   Internet -- DSL -- router -- LAN
                                            |
                                        router
                                           T1
                                            |
                                           T1
                                        router
Offic2                                    |
   Internet -- DSL -- router -- LAN

Yes, you will need 2 new routers with T1 capabilities.
Suggest you look at the Adtran NetVanta 3200 Access router with T1 CSU/DSU
http://www.adtran.com/adtranpx/Rooms/DisplayPages/LayoutInitial?ProductCategory=com.webridge.entity.Entity%5BOID%5B136477C9C61AF14ABFBF96C1525D727F%5D%5D&Product=com.webridge.entity.Entity%5BOID%5B43A10D2952FE8C4791B671A3558684AE%5D%5D&Container=com.webridge.entity.Entity%5BOID%5B55C40AA0A26ED711A78500D0B72032D8%5D%5D

The existing routers will need to have static routes entered for the remote network, else you will need to enable a dynamic routing protocol like RIPv2 so that all 4 routers can now exchange route tables.


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by:jplagens
ID: 12660638
yes, it just hit me today that the Netgear routers are not going to cut it with a T-1 line.  Your diagram makes perfect sense.  Now in terms of configuring the T-1 routers for the point-to-point connection.  Will I have a static IP address supplied from the ISP for both ends of the Point-to-Point connection?

I found the router you suggested online.  Is this the correct one that I need to get:
http://www.nextwarehouse.com/prod.cfm/49521/4200862L1

How "user-friendly" is this router to configure?

thank you!
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Expert Comment

by:lrmoore
ID: 12660723
That's the one!
I'm not sure that any T1 router is truely "user friendly", but these routers have a web interface that makes it pretty easy to setup.
With a point-to-point leased line, you will provide all your own IP addresses. You can use a different subnet for the link between the two sites.
Example, Office 1
LAN = 192.168.22.x
Adtran LAN interface = 192.168.22.254 255.255.255.0
Adtran T1 ppp interface = 192.168.255.1 255.255.255.0

Office 2
LAN= 192.168.33.x
Adtran LAN interface = 192.168.33.254 255.255.255.0
Adtran T1 ppp interface = 192.168.255.2.0 255.255.255.0

Enable RIP on all 4 routers and off you go!
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by:jplagens
ID: 12671117
That answers my question!  Thank you for such a prompt response.  Should be deploying this in the next couple of weeks.  I'll post another question if I run into any problems.  thanks agan!
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