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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » Changing the CONNAME for a CLUSRCVR channel

Changing the CONNAME for a CLUSRCVR channel

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foopy

Posted: Wed Sep 16, 2015 1:27 pm Post subject: Changing the CONNAME for a CLUSRCVR channel

Newbie

Joined: 21 Dec 2010
Posts: 6

I need to change the CONNAME for a couple of CLUSRCVR channels due to IP address changes being implemented. Forgive me if this is posted here already, for the life of me I can't find it. I will not have time to wait for the DISCINT for the channels to expire, we'll be in a tight window. Do I need to SUSPEND the queue managers from the cluster before I do the ALTER and then REFRESH the cluster? Or can I simply stop the CLUSRCVR channels, do the ALTER, then restart them?

fjb_saper

Posted: Wed Sep 16, 2015 8:01 pm Post subject:

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY

Neither. For something like changing the IP you might even have to reset the sequence number.

This is why it is better to keep the DNS name. This way the change of IP is transparent and only affects the TCP/IP layer.

Now being as it may, you will have to

Stop the cluster receiver channel
remove the cluster receiver channel from the cluster
change the cluster receiver channel (conname)
start the cluster receiver channel
stop the cluster receiver channel
add the cluster / clusternl attribute back to the cluster receiver channel
start the cluster receiver channel
Wait for the rest of the cluster to catch up

Have fun

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MQ & Broker admin

PeterPotkay

Posted: Thu Sep 17, 2015 3:23 am Post subject:

Poobah

Joined: 15 May 2001
Posts: 7717

Take a look here:

Quote:

If the queue manager is staying on the same host, but the IP address is changing, then the process is as follows:

http://www-01.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mq.con.doc/q004820_.htm?lang=en

This is also interesting:
http://www-01.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mq.con.doc/q017420_.htm?lang=en

It shows how to set up a Queue Manager's CLUSRCVR channel without a CONNAME value at all, if your server is using DHCP and its IP address might change. That's in effect what you are dealing with, a changing IP address. I have never used this blank-CONNAME-on-a-CLUSRCVR feature.
_________________
Peter Potkay
Keep Calm and MQ On

foopy

Posted: Thu Sep 17, 2015 11:28 am Post subject:

Newbie

Joined: 21 Dec 2010
Posts: 6

Thanks for the replies, much appreciated. I agree that using DNS instead of IP addresses is preferable. I intend to go in that direction. I think it will be best to use the KC directions, especially since the quote speaks exactly to wht I need to do. Thanks.

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