[ngw] New GW hardare - same IPs?

Mark Currie MCurrie at laserfast.com.au
Tue Nov 3 23:27:11 UTC 2015

Hi Mike,

The main thing is when switching addresses on OES servers it that you use the change IP scripts which are documented in the OES documentation. And always check the communications of NDS afterwards, if the new and old addresses are on the same subnet you should not have any issues, but if they are on different subnets then you make need to use the hosts.nds to assist edirectory to find it's replicas. Always make sure you DNS and hosts files on the OES servers reflect the changes as well.

Mark Currie

-----Original Message-----
From: ngw-bounces+mcurrie=laserfast.com.au at ngwlist.com [mailto:ngw-bounces+mcurrie=laserfast.com.au at ngwlist.com] On Behalf Of Mike Lichtenwalner
Sent: Wednesday, 4 November 2015 7:40 AM
To: ngw at ngwlist.com
Subject: [ngw] New GW hardare - same IPs?

Hi All,

In the very near future, we will be moving our primary domain/PO server and secondary domain/GWIA/webaccess server from 32-bit SLES physical servers running GW2012 to 64-bit SLES/OES virtual servers running GW2014. I'm following Danita's guide (it's excellent) for this process.

To avoid problems with upstream providers as well as any internal services that are using only IPs to contact the servers, I would like to configure the new virtual servers with the same IPs that are being used by the physical servers. Is it as simple as setting up the new servers with different IPs and after the migration is complete add the old addresses as secondary addresses? (My understanding is that changing the address of a SLES/OES server and getting all services to work correctly can be challenging.)

Has anyone had success with reusing IPs after a migration?


Mike Lichtenwalner
Coordinator of Technical Services
Manheim Township School District
Lancaster, PA

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