Redunant Internet connectivity design question

Posted on 2009-02-17
Last Modified: 2013-11-12
We are looking to implement a redundant Internet connection with another carrier.  I had implemented a similar scenerio years ago with Internap and Sprint, 2-6509's, our own AS number, and running BGP on the out and EIGRP on the inside. Worked like a champ but this required FlexWan modules with DS3 WICs on both cores and the whole thing was very $$.

Currently we have a 20MB pipe with Comcast.  They have their gear installed at our loction and hands off the Internet connection thru a switch port to our core 6513.  We use their IP addresses and have no AS number.  

Is there another way to do this without all that $$?  Has anyone out there implemented something similar?  Does anyone know if I can get redundant Ethernet hand-off's and what routing protocols have you used?


Question by:Oyurttas
    1 Comment
    LVL 4

    Accepted Solution

    If you want redundant paths IN to your network, from multiple ISPs, you will need to run BGP and have a public AS number.

    If you are multihoming to the same ISP, this may not be necessary if they will allow you to talk another IGP with them.

    If you are only concerned with outgoing traffic, you can just use your IGP and track the external links.

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