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Datacenter Downsizing Wiring

Posted on 2013-01-16
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Last Modified: 2013-01-18
At our colocation facility, my company current has two 100mb circuits for internet connectivity, each connecting to a router.  We are scaling back at this colocation facility and will be dropping one of the circuits, but combining the allocated IP's to the single remaining circuit.   Can I connect the remaining circuit with the combined IP's and the two routers to a switch? or do I need to reconfigure one of the routers to handles all the IP's?  Diagram for clarity attached.  Thanks.
CircuitRewire.pdf
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Question by:gtkdw
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by:Leeeee
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Are the two circuits through two different ISPs? Are you advertisement via BGP currently?
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by:gtkdw
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Circuits are from the same ISP.  Not sure regarding BGP.
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by:Leeeee
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In theory, you should be able to do this. With the layer 2 segment in between your edge routers and the sp edge, make sure your ISP is on board as you may need to coordinate the IP configuration.

Without knowing how your current IP space has been allocated to you, I have seen this set-up at several customers I have worked at. Are you consolidating the IP space to one /24? How was it broken up in the current environment?
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by:gtkdw
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We currently have multiple /24's on each circuit.  All together it will be four /24's and one /23 on the remaining circuit.
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Leeeee earned 250 total points
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It may be beneficial to research how your ISP is handling routing regarding those subnets in the current environment, and whether they are advertising those networks for you or if BGP is running on your edge routers. Do you have access to them or are they managed by your ISP?
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by:gtkdw
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I have access to them.
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After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

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