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Internet over MPLS

I have few offices connected in MPLS network and each office has its own internet circuits. I recently spoke to a SP who suggested to have internet circuit only in the head offcie and share it with the other offices over the MPLS. I have tried to do some research but it's all too technical to me. Can someone explain briefly how does this work, what are the pros and cons of doing this and high risks? What will be the equipment needed in the remote offices? If let's say I want to make sure each office gets 20 Mbps and I have 5 offices what type of connections do I need for the other offices?

Thank you!
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Cozumel
Asked:
Cozumel
1 Solution
 
Fred MarshallCommented:
As far as the last question: If you need 20Mbps for each of 5 offices then worst case would be 5X20Mbps = 100Mbps at the main office internet connection.  You may do better than this in view of the fact that not all offices may be demanding much at the same time.  

This means you will not likely want to have anything less than Gigabit speeds between the internet connection and the MPLS router(s).  But you can try it without of course.  You may be stuck with 100Mbps Fast Ethernet anyway in one of the devices.  In that case it may not matter much.  But, I would try...  

If you already have the MPLS set up then a little of the description depends on how you have it connected.

If you have the MPLS interfaces separate from the network gateways (which it sounds like) then you do this:

- set the remote site's gateways to the local MPLS router IP address.. thus pointing the internet access to the MPLS link.
- If you have any web filtering, etc. at the main site, you will want to expand the settings to include the remote office IP addresses in those filters.

Presumably, you already have the routing set up for interoffice network communications so that's already done.  

So, from where you are today, this should be pretty easy.  You can test it with a single computer at each site by simply changing its gateway address.  .. unless I've forgotten something.
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