[ActiveDir] Change private IP on a cluster

Mon, 05 Jun 2006 08:18:22 -0700

Hi Mike,

 

I am not sure what your project involves and you fail to mention why you are doing this. Are you moving the cluster to a new switch? Replacing the Router? Why are you making this change?

 

It will take several minutes for your ARP table on the router or routers to be updated unless you enable “Gratuitous Arp “, and since your clients connect via name lookup to IP address mapping, you probably will have disconnects, and may want to manually tombstone the record on your WINS servers, not to mention your DNS record will be cached on your DNS servers, unless you are in a small environment and have very few DNS servers ( I am not sure how long Microsoft’s DNS takes to replicate via AD integrated DNS but the default time for AD replication between DC’s is 5 minutes ).

 

Also these articles may be helpful to you:

 

MAC Address Changes for Virtual Server During a Failover with Clustering

http://support.microsoft.com/?kbid=244331

 

Behavior of Gratuitous ARP in Windows NT 4.0

http://support.microsoft.com/kb/199773/EN-US/

 

To be safe I would notify your IT customers of this change and plan on doing this during non business hours.

 

Let me know how every thing works out, I am curious to see what issue’s you may find.

 

Sincerely,

Jose Medeiros
Storage Area Network Systems Engineer
MCP+I, MCSE, NT4 MCT
408-765-0437 Direct
408-449-6621 Cell

"Anyone who has never made a mistake has never tried anything new."

                                                                                                Albert Einstein

 

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Newell
Sent: Monday, June 05, 2006 7:00 AM
To: [email protected]
Subject: RE: [ActiveDir] Change private IP on a cluster

 

Thanks Jose,

This is just going to affect the private IPs in the cluster so no name resolution issues will come into play.

 

This helped a lot. It lead me to http://support.microsoft.com/kb/241828/ which is pretty clear. I’m looking at some downtime on the cluster and that’s what I needed to know. I was *assuming* that when I changed the IP on both private interfaces the cluster would come back up and there would be no downtime but it looks like that’s not going to be the case L

 

Last quick question. The article states there may be a failover if I change the IP and subnet. Do you think the cluster will fail over if I just change the IP and don’t change the subnet?

 

Thanks again, I appreciate the help.

 

From: Jose Medeiros [mailto:[EMAIL PROTECTED]
Sent: Sunday, June 04, 2006 9:53 PM
To: [email protected]; [EMAIL PROTECTED]
Cc: Mike Newell
Subject: Re: [ActiveDir] Change private IP on a cluster

 

Hi Mike,

 

I've only had to change a SQL 2000 Active / Active Cluster IP and it involves some additional steps for SQL Virtual Names. It's been over 5 years since I built an Exchange 2000 cluster, but I do not recall if Exchange has any dependencies (I would probably post this to the Exchange list and I am cc'ing them as well)

 

Take a look at :

Exchange Server 2003 Cluster Configuration Checklist

 

Changing the IP address of network adapters in cluster server

 

 

Also just in case you ever have to change it on a SQL:

 

How to change the network IP addresses of SQL Server virtual servers

 

Hope this helps,


Sincerely,

Jose Medeiros
MCP+I, MCSE, NT4 MCT
408-765-0437 Direct
408-449-6621 Cell

--------------------------------------------------------------------------------------------

----- Original Message -----

From: "Mike Newell" <[EMAIL PROTECTED]>

Sent: Sunday, June 04, 2006 12:53 PM

Subject: [ActiveDir] Change private IP on a cluster

 

Doh! Didn't mean to let this go without the OT:. Sorry.

________________________________

From: [EMAIL PROTECTED] on behalf of Mike Newell
Sent: Sun 6/4/2006 11:40 AM
To: [email protected]
Subject: [ActiveDir] Change private IP on a cluster


Hey,
I have an Exchange 2003 active/passive cluster on Windows 2003 and I need
to change the private ip on both nodes. I realize that while I'm
changing the IP the nodes will not talk to each other and likely kick
the passive node off or stop the cluster service for a few minutes on
the passive node.

Is there anything else I will need to do or look out for? I don't
*think* this is a big deal but since it's a production cluster, and I've
never had to do this, I thought I would check before I tried it.

Thanks again.

Mike.


This message and any attachments (the "Message") may contain confidential, proprietary and/or privileged information and are only for their intended recipient(s). If you are not the intended recipient, you should notify the sender and delete the Message. E-mail transmissions cannot be guaranteed to be secure or error-free. This Message is provided for information purposes and should not be construed as a solicitation or offer to buy or sell any securities or financial instruments, or to provide investment advice in any jurisdiction where the sender is not properly licensed or permitted to do so. This Message is subject to additional conditions and restrictions. Please read them here: http://legal.dimensional.com/email/

Reply via email to