Virtualization

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Networking
Virtualization
Hello, I would like to know the best method of moving a complete network to new location and be able to consolidate and Virtualize Servers at the same time at a minimum down time (weekend)? Basically, how do you keep the server names the same, IP address?etc so that you will not run into problems letter on. Or is better to come up with new network setup and do a restore? Please, throw your suggestions. Thanks in advance.
ASKED: January 2, 2007  10:17 AM
UPDATED: September 26, 2007  6:17 PM

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If you are moving to a new location, then, it would be better to set the servers you want to virtualize in the new location while the old servers are still in the old location. Move all the data to the new location and set it up with the same Names and IPs (not in the domain). Then when you move, move the new data (since the last restore)to the virtual servers and then remove the servers from the domain (all servers that you virtualized), move all equipment to the new location. finally rejoin all vitual servers to the domain. This will minimize your down time. You could also move then do the virtualization in steps by servers.

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  • Knomis
    normally you would not do the two together. i would do the move first and then think about doing the virtulization in increments. build the virtual server and keep it off line. give the virtual servers a different ip range. ie 192.xxx.xxx.xxx and 193.xxx.xxx.xxx. after you have completed the virtualization build, take your live servers offline and reassign those ip addresses to the virtual server. test it out. if it does not work, then take it offline and bring up the original servers. if you have the time, do the virtulization first and cutt over the the virtual box before you move. since the network is working in the current location, you can rule out any physical connection problems (bad cables etc...) if the network does not work after cutting over.
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  • Larrythethird
    Having been forced into just such a scenario on more than one occasion, it all depends on the resources you have available. If you have the IP ranges and enough routers and switches for both sites, a parallel network is ideal. Create a tunnel between them until the move is finished. That way, you can move pieces at a time and just redo the piece for the new network. If that is not possible, my second choice would be a shutdown/forklift weekend. That usually means a lost weekend for all network capable IT people, and a nightmare Monday and maybe Tuesday. There are always so many little things forgotten when moving an entire network. A certain percentage of things always fail after you move them. And then, the changes during the process to the previously agreed upon and approved plan add unneeded complexity to everything. Good luck.
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  • Rejoice
    Thank you all for your suggestions. I will try to convince my boss to do one thing at time, so that it will be easier for us to like you said rule out any problems. We are better of to move first, once everything is settled, we can do the virtualization afterwards without any stress.
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  • DavidLevine
    Virtualizing can be a fairly sizable project. I assume that your entire company is moving to a new location or maybe just the data center is moving to a new location? What platform have you decided to virtualize on? VMWare? Xen? M$?
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