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Documentation help, and technical advice
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| marcusdan 2001-02-20, 9:52 am |
| Real work problem. The company I work for has 15 sites in our WAN. We are soon to be changing our data service provider, and upgrading all of circuits (frame-relay). I am fortunate in the fact that we are getting 15 new routers. What I would like to do is dual-home our WAN to run concurrently on both providers until I am sure that all circuits are up. Has anybody had any experience doing this? Any suggested readings? Any and all advice will be appreciuated.
Marcus | |
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| You are thinking correctly!!!
Absolutely you should do this and it's my experience that most people do it that way too.
Your primary concern will be that the Serials stay up with the new provider and you won't care a bit about your ethernets.
Because they will be running concurrently to the same core routers, the serials will need new IPs and you can leave the ethernets the same but shutdown. This will allow you to fully test your new circuits while not interfering with your existing network.
Hope I haven't left anything out!
Yankee | |
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| I assumed that the ethernet interface on the new routers would stay shutdown until I shutdown the old routers and old circuits. What you are saying is that I need no serial interface IP addresses between all routers correct? I was planning on duplicating all of my static route statements and gateways of last resort, and because we are using EIGRP, I will let the routers do the rest. I suppose that I will need to make ammendments to my static routes based upon the new IP addresses. Am I still on the right track? Is there anything else I need be concerned with? I appreciate your advice.
Marcus
CCNA | |
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| Yes, keep the ethernet shutdown until you are ready to bring it on line.
I assumed you are using subinterfaces on the core router for each remote site and on the remote router for each PVC if you are doing any kind of redundancy back to the core. If those assumptions are correct then you do have IPs assigned on each sub and you do not want them duplicated on the new and old routers. Any routing protocol would hate having dupe network addresses active!
Hope this is clearer,
Yankee |
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