Take a look at what does and doesn't work. First off, can you ping the host in a reasonable amount of time? If not then a traceroute between the two machines may lead to the problem. Once had a server that sent out a it's traffic for a certain host to the internet. Bad routing table was what it turned out to be. Dick Goulet Senior Oracle DBA PAREXEL International -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Ray Stell Sent: Friday, August 14, 2009 9:31 AM To: hrishy Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: Where do i start for troubleshooting this issue On Fri, Aug 14, 2009 at 06:40:26AM +0000, hrishy wrote: > When i do a tnsping to the service name in a shell script the listener responds in like 3500 secs ocassionally. > Where do i start troubleshooting this issue ? If it were me I'd use tcpdump first to see what the differential on the packet delivery looked like. tcpdump is unintrusive and that is why I would start there. -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l