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Combining T1s questions

Howdy Experts!

I have some questions about combining some separate interent connections into one and am hoping some of you experts can lead me in the right direction.  I will award the points to the most helpful response.

The current setup is that we have a partial T1 (768 Kbps data, and 12 voice channels), a full T1, and are adding a 2 Mbps wireless connection.  All three are are on completely separate subnets and do not work together.  The wireless connection will actually be from a different ISP in an effort to improve reliability.

My questions:
- What is the best way to combine all three of these internet sources into one large pipe for my internal users to access?
- Currently, the full T1 is dedicated to some hosting services we provide.  If I combine everything, how can I be sure the hosting services are getting all the bandwidth they need?  I do not want an internal user's activity to affect the hosting server's performance.
- On the reliability question - I am hoping to have this set up so that if one ISP goes down, our users can still get out, and the hosting services are still alive.  
- Talk a bit about security.  I currently have separate firewalls on all three connections, plus a DMZ on the partial T1.  If all of these are combined, could I reproduce the DMZ?  Would I still need 3 firewalls?  Management is a pain....so getting rid of a couple would be a bonus!  :-)

Thank you, and I look forward to your responses.

1 Solution
To accomplish this you will need the following :

1). A router which supports multiple separate interface types, T1 WIC, ETH0 for wireless, etc.
I recommend Cisco 2800 series

2). A router which supports load balancing of links and failover (if one link dies)
I recommend Cisco 2800 series

3). A router which supports QoS (Quality of service) which will guarantee you get the correct dedicated throughput for HTTP/HTTPS for your hosting leased line.
I recommend Cisco 2800 series

- SaP -


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