I agree with Wolfgang. One listener for the server. The comment about Oracle Home maintenance is weak. We do maintenance on an Oracle home so infrequently, that this is not an issue. And you can always start up another listener from the other home temporarily if you need to. Running three listeners is a waste of processing and memory (unless you have a specific business need to do so). I run the most recent Oracle Home listener on the server that I can. So in your case, use the 10.2 listener. -------------------------------------------------------- This transmission may contain confidential, proprietary, or privileged information which is intended solely for use by the individual or entity to whom it is addressed. If you are not the intended recipient, you are hereby notified that any disclosure, dissemination, copying or distribution of this transmission or its attachments is strictly prohibited. In addition, unauthorized access to this transmission may violate federal or State law, including the Electronic Communications Privacy Act of 1985. If you have received this transmission in error, please notify the sender immediately by return e-mail and delete the transmission and its attachments. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Wolfgang Breitling Sent: Wednesday, November 29, 2006 10:54 AM To: smishra_97@xxxxxxxxx Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: Multiple Listener You can use the 10.2 listener to service all databases. Listeners are backward compatible. You only need to run 1 listener of the same version as your "highest" Oracle version database. At 08:23 AM 11/29/2006, Sanjay Mishra wrote: >I have three Oracle software in one server 8.06, 817 and 10.2.0.2 >and each one is having one instance running on the server. Do I need >to run three listener for all three Database separately on 3 >different Port or there is any way that I can use one Listener to >take care of all Client request. Regards Wolfgang Breitling Centrex Consulting Corporation www.centrexcc.com ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l