[ExchangeList] Fw: Change private IP on a cluster- reply
- From: "Jose Medeiros" <josemedeiros@xxxxxxxxxxx>
- To: <exchangelist@xxxxxxxxxxxxx>
- Date: Mon, 5 Jun 2006 21:54:38 -0700
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From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Mike Newell
Sent: Monday, June 05, 2006 10:50 AM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Cc: Jose Medeiros; Douglas R. Spindler; president@xxxxxxxx
Subject: RE: [ActiveDir] Change private IP on a cluster
Hey Jose,
I need to change the IP on the two network cards that the servers use to
monitor the heartbeat between them. Each server in the cluster has two NIC's in
them, one for monitoring the heartbeat between them (private), and one for the
internal LAN.
We have just added an office that shares the same subnet as the private side of
the cluster so no one in that office can see the cluster. I don't need to
change the IP's on the LAN side of the servers or change the VIP used for the
cluster.
I was hoping that it would only affect the communications between the servers
and not fail over or prevent anyone from accessing the cluster. My thought was
that I could just change the IP on each server and after a few seconds the
clustered servers would see each other again and continue to function normally.
Again, I really appreciate the help.
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From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Medeiros, Jose
Sent: 05 June 2006 07:58
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Cc: Jose Medeiros; Medeiros, Jose; Douglas R. Spindler; president@xxxxxxxx
Subject: [ActiveDir] Change private IP on a cluster
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 need to be updated 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
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From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Mike Newell
Sent: Monday, June 05, 2006 7:00 AM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
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.
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From: Jose Medeiros [mailto:josemedeiros@xxxxxxxxxxx]
Sent: Sunday, June 04, 2006 9:53 PM
To: ActiveDir@xxxxxxxxxxxxxxxxxx; exchangelist@xxxxxxxxxxxxx
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
http://www.microsoft.com/technet/itsolutions/msit/operations/exchclustercklist.mspx?pf=true
Changing the IP address of network adapters in cluster server
http://support.microsoft.com/kb/230356/EN-US/
Or in PDF format at:
http://www.maned.com/support/knowledge_base/Roundhouse/Recommended_Reading/Q230356.pdf
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
http://support.microsoft.com/kb/244980/en-us
Hope this helps,
Sincerely,
Jose Medeiros
MCP+I, MCSE, NT4 MCT
408-765-0437 Direct
408-449-6621 Cell
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----- Original Message -----
From: "Mike Newell" <mike.newell@xxxxxxxxxxxx>
To: <ActiveDir@xxxxxxxxxxxxxxxxxx>
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: ActiveDir-owner@xxxxxxxxxxxxxxxxxx on behalf of Mike Newell
Sent: Sun 6/4/2006 11:40 AM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
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.
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