Solved Redirect Network Traffic Through a Point to P

July 14, 2011 at 11:59:46
Specs: Windows 7
We have a point to point connection going from a regional office to the main office this is provided by a Service Provider. In our office we have an ISP and what we need to prevent from happening is that if the internet drops from the ISP we could somehow re-direct the internet traffic through this point to point connection and make it so that our Internet connection is pulled from the main office. Is this possible, if so is any hardware needed? is it just a matter of re-configuring? please assist! Thank you.

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July 14, 2011 at 12:13:28
"what we need to prevent from happening is.... that if the internet drops from the ISP we could somehow re-direct the internet traffic through this point to point connection "

oxymoron statement. you want this to happen or not happen. Please clarify.

Are you routing thru this PtP or bridging? In other words do the pcs have two gateway entries?

Answers are only as good as the information you provide.
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July 14, 2011 at 12:15:50
✔ Best Answer
From the sounds of it, this is a dedicated physical link (leased line) between buildings. I'm I'm wrong, please correct me.

If I'm right, then it sounds like both physical locations have their own (separate) internet connections. Again, if this is wrong, correct me.

If I'm right in both cases, then I have to ask, are the two separate internet connections from different providers or the same one? If both are from the same one (and the same provider you have your leased line with) then it seems most likely to me that should the ISP encounter issues that cause your loss of connectivity, it would affect both physical locations equally in which case, a failover solution like you're asking about, would be moot.

If however your main office has internet access from ISP A and your remote office with ISP B, then a failover would work. If that is the case, I would do the failover at both ends.

A failover solution like this could be achieved easily with either a software or a hardware solution. Speaking solely of software, I'm pretty sure you could do this with OpenBSD or FreeBSD. If you know either (or both) I would look into redundant teamed servers at both locations.

If you're not familiar wtih BSD, you could buy routers capable of doing this. We're doing something similar with our BGP routing using Nortel (now Avaya) Secure Router.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***

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July 14, 2011 at 12:20:30
Sorry for my in-proper english... however,
if the internet should fail through our ISP we want to re-direct NT traffic through our PTP we do have the same gateway address on our main office as we do here in the branch office. therefore I believe that this is done through bridging.

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July 14, 2011 at 12:30:25
@ Curt R

Curt Thank you for your answer and to review the information yes you are correct this is a leased line between buildings and yes both buildings have a separate ISPs We use ISP A and They use ISP B. The leased line is simply used to keep a live connection at all times without the use of a VPN. The failover that is being considered at the moment is to have an on-demand ISP provider in case that we should loose connectivity. In order to cut back on operation costs we are also considering the option that I have posted which is to re-direct using the ptp however since the main site has ISP B we are not sure if it can be done as to pull their internet connection temporarily. while our service is restored. We are using small business cisco routers at both ends I'm not sure if that hardware is capable of doing what you are refering to. Thank you for your reply.

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July 14, 2011 at 13:23:50
@ Curt R

Could you please go into further detail regarding the failover solutions you are proposing please?

Thank you

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