Rebuild publisher without rebuilding subscriber.

Unanswered Question
May 8th, 2007

Sorry if this has been asked a million times but I can't seem to find the answer and I sort of looking for a "its ok" kind of answer.

Can I rebuild the publisher (to the same patch level as the existing publisher)without rebuilding the subscriber? I have a hard drive that?s about to go bad (S.M.A.R.T. alerts) in my publisher and want to rebuild to a new hard drive before the main one completely fails.

FYI my pub and sub is running 4.1.3sr1 and 2000.2.7sr7 (i know its old). My plan is to bring everything to current versions once I move to the new hard disk on the publisher.

I have this problem too.
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gogasca Tue, 05/08/2007 - 11:39

Yes, you can do that without a problem, make sure you use same HOstname, IP address (can be changed but will avoid problems) and CCM version including any SR or ES.

rob.huffman Tue, 05/08/2007 - 11:44

Hi Ricky,

Yes, you should be good to go with this plan. Here is a little added info (just in case);

Replacing the Publisher Database Server After the Installation

To replace an existing or failed server, perform the following steps:

1. Install the operating system and the Cisco CallManager software as if it were a new installation by using the Cisco-provided operating system disks and the operating system documentation.

2. Upgrade to the version of the Cisco CallManager that you want to restore.

3. If necessary, reinstall the Cisco IP telephony applications, plugins, and service releases to the version that is compatible with the restored version of Cisco CallManager.

4. To obtain the locales that were used prior to the restoration, reinstall the Cisco IP Telephony Locale Installer.

5. Restore the backup data to the new server and reboot the server.

To restore the data, you must have backup data stored on tape or on a network directory, not on the local directory of the existing or failed server.

6. Verify that the data was restored to the new server.

7. If you are replacing a server with four drives, Cisco recommends that you set the trace directory path on the server to the default C: drive before you backup your server.

8. If your server has four drives, you can configure the trace drive for trace file collection.

From this doc;

http://www.cisco.com/en/US/products/sw/voicesw/ps556/prod_installation_guide09186a00803f5c57.html#wp534959

Hope this helps!

Rob

**EDIT: Gonz, you are too fast for this Old guy!

ricky-li Tue, 05/08/2007 - 11:46

Thanks for the quick responses, and for the steps. I'll let everyone know how its goes.

ricky-li Fri, 05/25/2007 - 13:24

It went great everyone, its been about a week since i did the rebuild and as far as I can tell the Subscriber has no idea that its talking to a rebuilt publisher. So its all good.

Thanks again.

s.casper_2 Thu, 06/28/2007 - 02:44

Geeting ready to replace my Pub with a new server and ran across this post. Couple of questions:

I want to minimize downtime as much as possible. When the new pub is on the network and not restored is everything down? Or does the subs maintain the database associated with the old pub until the new pub is restored and rebooted?

Thanks,

Steve

rob.huffman Thu, 06/28/2007 - 05:47

Hi Steve,

When the new Pub is on the network but not finished rebuilding the Subs should still be "good to go" and continue to support the IP Phones etc. Things like setting/unsetting Call Forward All will not work due to the break in the Db. If you make sure that your phones are already registered with your Subs there should not be any noticable hit at all. I would still want to do this during a maintenance window just to be on the safe side.

Hope this helps!

Rob

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